Method of manufacturing a continuous filament by electrospinning and continuous filament manufactured thereby

Inactive Publication Date: 2009-12-31
KIM EE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0062]The present invention is very superior in terms of physical properties because the continuous filament is composed of an aggregate o

Problems solved by technology

In order to produce artificial leather from the fiber prepared by these methods, a complex process must be carried out, including melt spinning, nano fiber production, non-woven fabric production, urethane impregnation and single component dissolution.
Nevertheless, it has been impossible to produce a fiber with a diameter 1,000 nm or less by the above two methods.
In case of the spit type conjugate spinning method, it has been problematic in that since two polymer components (for example, polyester and polyamide) with different dyeing properties co-exist in a fiber, uneven dyeing occurs and an artificial leather production process is complicated.
In addition, it has been difficult to produce a fiber with a diameter 2,000 nm or less by the above method.
Thus, it is difficult to prepare a continuous filament using the conventional electrospinning method.
Hence, to prepare a continuous filament, the produced nano fiber web has to be cut to a predetermi

Method used

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  • Method of manufacturing a continuous filament by electrospinning and continuous filament manufactured thereby
  • Method of manufacturing a continuous filament by electrospinning and continuous filament manufactured thereby
  • Method of manufacturing a continuous filament by electrospinning and continuous filament manufactured thereby

Examples

Experimental program
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Effect test

example 1

[0099]A polymer spinning dope was prepared by dissolving nylon 6 resin, which has a relative viscosity of 3.2 in a 96% sulfuric acid solution, in formic acid at a concentration of 15% by weight. The polymer spinning dope had a surface tension of 49 mN / m, a solution viscosity of 40 centipoise at an ambient temperature, and an electrical conductivity of 420 mS / m.

[0100]The prepared spinning dope was electrically spun onto a collector 7, which is a disk-shaped stainless steel plate having a high voltage applied thereto and rotating at a rotational linear velocity of 20 m / sec, through nozzles 2 with a high voltage applied thereto in the electrospinning method as shown in FIG. 1, thereby collecting electrospun nano fibers 4 on the collector 7.

[0101]The collector rotates by being connected to a rotary motor 10 by connecting rods 8 and 9, and has a diameter of 1.5 m. The height (h) of the collector is 25 mm.

[0102]The total number of the nozzles 2 is 900. They are arranged in 300 matrices in...

example 2

[0107]A continuous filament was prepared under the same procedure and conditions as in Example 1 except that the rotational linear velocity of the collector 7 and the surface velocity of the collecting roller 11 were changed to 10 m / sec, respectively. As a result of evaluating the physical properties of the prepared continuous filament, the strength was 140 MPa, the degree of elongation was 32%, and the nano fibers were arranged at an arrangement angle of 2.8° in the axis direction of the filament.

[0108]FIG. 8 is an electron micrograph of the surface of the prepared continuous filament. A stress-strain curve graph of the prepared continuous filament was as shown in b of FIG. 9.

example 3

[0109]A polymer spinning dope was prepared by dissolving a poly(ε-caprolactone) polymer (purchased from Aldrich Chemical Company) having a number average molecular weight of 80,000 in a mixed solvent of methylene chloride / N,N′-dimethyl form amide (volume ratio: 75 / 25) at a concentration of 13% by weight. The polymer spinning dope had a surface tension of 35 mN / m, a solution viscosity of 250 centipoise at an ambient temperature, an electrical conductivity of 0.02 mS / m and a permittivity constant of 90.

[0110]The prepared spinning dope was electrically spun onto a collector 7, which is a disk-shaped stainless steel plate having a high voltage applied thereto and rotating at a rotational linear velocity of 10 m / sec, through nozzles 2 with a high voltage applied thereto in the electrospinning method as shown in FIG. 1, thereby collecting electrospun nano fibers 4 on the collector 7.

[0111]The collector rotates by being connected to a rotary motor 10 by connecting rods 8 and 9, and has a d...

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Abstract

Disclosed are a method of manufacturing a continuous filament by electrospinning, and a continuous filament manufactured thereby. Electrospun nano fibers 4 are collected on a collector 7 by electrically spinning a polymer spinning dope in a spinning dope main tank 1 onto the collector 7, which is a disk-shaped conductive material with a high voltage applied thereto and which rotates at a rotational linear velocity of 5 m/sec or more, through nozzles 2 having a high voltage applied thereto, and then the nano fiber 4 collected on the collector 7 are prepared in the form of a continuous filament by use of a collecting roller 11, and then the nano fibers 4 are (I) put in a canvas 14 through a traverse 13, or (II) dried, drawn, and wound consecutively.
The continuous filament is superior in terms of drawing properties because nano fibers are arranged well in a filament axis direction, the continuous filament composed of nano fibers can be prepared by a continuous procedure, and the prepared continuous filament is useful as materials for various industrial fields, such as artificial leather, filters, and so on.

Description

[0001]This application is a Divisional of co-pending application Ser. No. 11 / 916,639, filed on Dec. 5, 2007 and for which priority is claimed under 35 U.S.C. § 120. application Ser. No. 11 / 916,639 is the national phase of PCT International Application No. PCT / KR2006 / 000963 filed on Mar. 16, 2009 under 35 U.S.C. § 371. The entire contents of each of the above-identified applications are hereby incorporated by reference.TECHNICAL FIELD[0002]The present invention relates to a method of manufacturing a continuous filament or yarn (hereinafter, commonly referred to as a “filament”) by an electrospinning method and a continuous filament manufactured thereby, and more particularly, to a method of manufacturing a continuous filament which is superior in physical properties and composed of a nano fiber by a continuous procedure by continuously producing a filament superior in drawing properties because of nano fibers well arranged in the filament axis direction, and then putting them in canv...

Claims

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Application Information

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IPC IPC(8): D02G3/22
CPCD01D5/0076Y10T428/2978D01D5/16D01D7/00
Inventor KIM, HAK-YONG
Owner KIM EE
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