Filament Bundle Type Nano Fiber and Manufacturing Method Thereof

Abstract

A filament type nano-sized long fiber and a method of producing the same are disclosed. In the method, a spinning solution or a spinning melt is electro-spun in drops using a spinneret to which a critical voltage is applied, and the spun drops are continuously collected on a multi-collector. The spinning solution is produced by dissolving a blend or copolymer consisting of two or more kinds of polymers in a solvent. The spinning melt is produced by melting the polymers. The multi-collector is selected from the group consisting of a plate type collector, a roll type collector, and a combination thereof. The filament type nano-sized long fiber is processed into a yarn through one step during the electrospinning process, and thus, mechanical properties are better than those of a conventional nanofiber non-woven fabric. Consequently, the filament type nano-sized long fiber can be utilized for the extended application.

Description

TECHNICAL FIELD[0001]The present invention relates to a filament type nano-sized long fiber and a method of producing the same. More particularly, the present invention pertains to a filament type nano-sized long fiber and a method of producing the same using an improved electrospinning process. In the method, a spinning solution or a spinning melt is electro-spun in drops using a spinneret to which a critical voltage is applied, and the spun drops are continuously collected on a multi-collector. In this regard, the spinning solution is produced by dissolving a blend or copolymer consisting of two or more kinds of polymers in a solvent. The spinning melt is produced by melting the polymers. Furthermore, the multi-collector is selected from the group consisting of a plate type collector, a roll type collector, and a combination thereof.BACKGROUND ART[0002]A nanofiber is an ultra-fine fiber having a diameter of 1-800 nm, and has various physical properties that cannot be gained from a...

AI Technical Summary

Benefits of technology

[0014]As described above, a filament type nano-sized long fiber, which is produced using an improved electrospinning process according to the present invention, has mechanical properties that are better than a conventional nanofiber non-woven fabric, thereby being applied as a substitute to all fields employing a conventional fiber having a micron-sized diameter. For example, first, the fiber of the present invention is useful as medical filters for kidney dialysis and purification of the blood, and various membrane reinforcing materials for genetic separation.Second, the fiber of the present invention is useful to produce ultra-thin reinforcing films and ultra-slim PCBs in electric / electronic fields.Third, the fiber of the present invention may be useful for ultra-small and ultra-light flying bodies or unmanned flying robots.Fourth, the fiber of the present invention is useful as a reinforcing material for an optical cable in an optical communication field.

Problems solved by technology

However, the nanofiber produced according to the conventional electrospinning process is limited to a non-woven fabric type.

Furthermore, they point out a problem that since the non-woven fabric type nanofiber consists of a single fiber, while the drops, which are formed at the tip of the spinneret during the electrospinning process, are spun toward the collector at a critical voltage (Vc), the single fibers collide with each other before the drops reach the collector.

Consequently, the single fibers are interfered or combined with each other, causing conglomeration.

The non-woven fabric type nanofiber has very poor mechanical strength.

Particularly, if the nanofibers are intertwined into a thread, undesirably, an additional connection fiber is required to connect the single fibers to each other, and the final thread is readily broken.

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