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Conjugate Electrospinning Devices, Conjugate Nonwoven and Filament Comprising Nanofibers Prepared by Using the Same

a technology of conjugating electrospinning and nanofibers, which is applied in the direction of spinnerette packs, filament/thread forming, manufacturing tools, etc., can solve the problems of reducing the electric force, failing to overcome the interface or surface tension of spinning dopes, and deteriorating the quality of the product, etc., to achieve the effect of simple facility and process

Inactive Publication Date: 2008-05-01
KIM EE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0074]The present invention can mass-produce two or more kinds of high quality nanofibers, and can produce a conjugate nanofiber non-woven fabric and a conjugate nanofiber filament suitable for the physical properties required for each purpose by simple facility and process.

Problems solved by technology

However, the conventional electrospinning devices and process for preparing the non-woven fabric using the same have a disadvantage in that an effect of electric force is reduced because the spinning dope is consecutively supplied to the nozzles having the high voltage.
In more detail, the electric force transmitted to the nozzles is dispersed to the whole spinning dope, and thus fails to overcome interface or surface tension of the spinning dopes.
As a result, fiber formation effects by the electric force are deteriorated and the spinning dope is dropped in the form of drops (hereinafter, referred to as “droplet”), which deteriorates the quality of the product and hardly achieves mass production of the fiber.
Moreover, in the conventional art, spinning is done at the one-hole level in most cases, and thus mass production and commercialization are not possible.
Moreover, the conventional electrospinning devices can electrospin only one kind of polymer spinning dope through the nozzles aligned in one nozzle block, and thus cannot effectively satisfy various physical properties (features) of a nanofiber non-woven fabric required according to purpose.
However, the above-described methods are problematic in that the production facilities and production process are complicated and the production cost increases.

Method used

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  • Conjugate Electrospinning Devices, Conjugate Nonwoven and Filament Comprising Nanofibers Prepared by Using the Same
  • Conjugate Electrospinning Devices, Conjugate Nonwoven and Filament Comprising Nanofibers Prepared by Using the Same
  • Conjugate Electrospinning Devices, Conjugate Nonwoven and Filament Comprising Nanofibers Prepared by Using the Same

Examples

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Effect test

example 1

[0111]Poly (ε-caprolactone) polymer (product of Aldrich, USA) having a number average molecular weight of 80,000 was dissolved in a mixed solvent of methylene chloride and N,N-dimethyl formamide (volume ratio: 75 / 25) at a concentration of 13 wt %, to prepare a spinning dope. The surface tension of the polymer spinning dope was 35 mN / m, the spinning dope viscosity was 35 centipoises at a room temperature, the electric conductivity was 0.02 mS / m, and the permittivity was 90.

[0112]Polyurethane resin (Pellethane 2103-80AE of Dow Chemical Company) having a number average molecular weight of 80,000 was dissolved in N,N dimethyl formamide at 8 wt. %.

[0113]The two kinds of spinning dopes were stored in the main tanks 1 and 1′, quantitatively measured by the metering pumps 2 and 2′, and supplied to the spinning dope drop devices 3 and 3′, thereby discontinuously changing the flow of the spinning dopes. Thereafter, the spinning dopes were supplied to the nozzle block 4 as shown in FIG. 6, and...

example 2

[0114]Poly (ε-caprolactone) polymer (product of Aldrich, USA) having a number average molecular weight of 80,000 was dissolved in a mixed solvent of methylene chloride and N,N-dimethyl formamide (volume ratio: 75 / 25) at a concentration of 13 wt %, to prepare a spinning dope. The surface tension of the polymer spinning dope was 35 mN / m, the spinning dope viscosity was 35 centipoises at a room temperature, the electric conductivity was 0.02 mS / m, and the permittivity was 90.

[0115]Polyurethane resin (Pellethane 2103-80AE of Dow Chemical Company) having a number average molecular weight of 80,000 was dissolved in N,N dimethyl formamide at 8 wt. %.

[0116]The two kinds of spinning dopes were stored in the main tanks 1 and 1′, quantitatively measured by the metering pumps 2 and 2′, and supplied to the spinning dope drop devices 3 and 3′, thereby discontinuously changing the flow of the spinning dopes. Thereafter, the spinning dopes were supplied to the nozzle block 4 as shown in FIG. 6, and...

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Abstract

Discloses are a conjugate electrospinning devices for preparing fibers (nanofibers) having a nano-level thickness, and nanofibers prepared using the same. The conjugate electrospinning devices comprises: spinning dope main tanks (1); metering pumps (2); a nozzle block (4); nozzles (5) aligned on the nozzle block; a collector (7) for collecting fibers spun from the nozzle block; and a voltage generator (9) for applying a voltage to the nozzle block and the collector (7), wherein [I] nozzles for spinning two or more different kinds of spinning dope are aligned on a nozzle block (4) regularly or in random order in repetitive units at the same ratio or in different ratios, aligned in random order at a predetermined ratio, or aligned thereon in random order at a predetermined ratio, or aligned thereon repetitively; [II] the number of the spinning dope main tanks (1) is two or more; and [III] a spinning dope drop device (3) is arranged between the spinning dope main tanks (1) and the nozzle block (4). Since two or more different kinds of spinning dopes are combined and electrospun, and thus the physical properties (features) of a non-woven fabric and a filament can be easily managed by a simple process. Nanofibers and their non-woven fabrics can be mass produced because the fiber formation effects are maximized.

Description

TECHNICAL FIELD[0001]The present invention relates to an conjugate electrospinning devices which can mass-produce two or more kinds of fibers having a nano level thickness (hereinafter, “nanofibers”) at a time by simultaneously electrospinning two or more different kinds of polymer spinning dope through nozzles aligned on one nozzle block.[0002]Moreover, the present invention relates to a conjugate non-woven fabric (herainfter, “conjugate nanofiber non-woven fabric) which is prepared by the aforementioned conjugate electrospinning devices and has two or more kinds of nanofibers mixed with each other.[0003]Moreover, the present invention relates to a continuous filament (herainfter, “conjugate nanofiber filament) which is prepared by the aforementioned conjugate electrospinning devices and has two or more kinds of nanofibers mixed with each other.[0004]Products, such as non-woven fabrics, membranes, braids, etc., composed of nanofibers are widely used for commodities, agricultural ap...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D4/02D01D5/04D01F8/04D04H1/728
CPCD01D5/0069D01F8/12D01D5/30
Inventor KIM, HAK-YONGPARK, JONG-CHEOL
Owner KIM EE
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