Method for preparing nano fiber endless tow

Abstract

The production method of filament of nanofibers is a simply and high efficiency way. It adopts spinning trunk (3). There are two lines of nozzles (1) whose spout are opposite at the height of the top of the trunk. There are several group of pare of thread guide roller (2) in the trunk.. The distance between thread guide roller and nozzles are equal. The material process is: 1) Transport high polymer solution to nozzles in the trunk of filament of nanofibers; 2) Bring high-voltage DC of opposite polarity to bear to the nozzles. 3) High polymer solution at the top of the nozzles is stretched and whipping responded to form nanofibers which contain electric charge. The opposite nozzle spray nanofibers contains contrary electric charge. They are allure and collide in the air and form nanofibers. The nanofibers are stretched and towed by nozzle and filament of nanofibers comes into being. The operation is simple, highly effective and has no losing of nanofibers.

Description

technical field [0001] The invention relates to a method for preparing nanofiber filament bundles, belonging to the technical field of special fiber preparation. Background technique [0002] Since the birth of the world's first chemical fiber - nitrocellulose in 1883, the research and exploration of synthetic fibers has developed rapidly, and accordingly, various spinning methods have emerged as the times require. The most commonly used spinning methods are melt spinning, dry spinning and wet spinning, others such as phase separation spinning, flash spinning, electrospinning, liquid crystal spinning, reaction spinning, etc. The methods are all newly developed special process spinning methods. [0003] Electrospinning has been recognized as a simple and efficient technique for fabricating fiber membranes. The diameter of electrospun fibers is 100-1000 times smaller than that obtained by ordinary spinning methods, and has a huge specific surface area. It can not only be us...

AI Technical Summary

Problems solved by technology

[0005] However, since the size of electrospun fibers is at the nanometer or submicron level, there are often cases of fiber loss, and during the electrospinning process, because the polymers carry the same charge and repel each other, the fibers scatter around and it is not easy to make long Nanofiber bundles or filaments

[0006] Some people use a grounded metal receiver in electrospinning to accept nanofibers produced by a nozzle and process them into nanofiber filaments. This method is inefficient

[0007] Some people use a multi-nozzle system during electrospinning. The nanofibers of the same charge produced by the multi-nozzles must first be in contact with a clean grounded metal receptor to dissipate the charge and then gather to form filaments. However, the nanofibers of the same charge produced by the multi-nozzles Mutual repulsion before reaching the metal receiver, the fibers fly apart, resulting in loss

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