Electrospinning apparatus

Abstract

An electrospinning apparatus capable of: forming a buffer section between the respective units of the electrospinning apparatus and installing a vertically movable adjustment roller in the buffer section to adjust the transfer speed and time of a long sheet, which passes through the respective units, for each section and prevents the crumpling, sagging, snapping, breakage, and damage of the elongated sheet, avoiding abnormal transfer of the elongated sheet due to electrostatic attraction during electrospinning and, in a nanofiber production step, disposing an apparatus for detecting the sagging of the elongated sheet before and after a spinning zone, detecting the sagging of the elongated sheet, and transmitting the signal to an apparatus for assisting the transfer of the elongated sheet so as to adjust the transfer speed of the elongated sheet. This automatically improves the sagging of the sheet and thereby effectively prevent the problem caused by the sagging of the sheet.

Description

TECHNICAL FIELD[0001]The present invention relates to electrospinning apparatus capable of: sensing a sagging of an elongated sheet which carries electrospinned polymer spinning solution so as to adjust the carrying speed and time of the elongated sheet, assisting carrying of the sheet, controlling the carrying speed, discharging amount of a nozzle block, and voltage intensity, thereby mass-producing of nanofiber having uniform air permeability and uniform thickness.BACKGROUND ART[0002]Generally, Nano Fiber refers to a Micro Fiber having an average diameter of tens to hundreds nm, products including nanofiber such as non-woven fabric, membrane, and braid are widely used as consumer goods, agricultural, clothing, and industrial ways.[0003]Moreover, nanofiber is used in various fields such as artificial leather, suedette, sanitary pads, clothing, diapers, packing materials, general goods materials, various filter materials, medical use materials in gene transporting, bulletproof jacke...

AI Technical Summary

Benefits of technology

[0043]The present invention having the structure as explained above, could adjust carrying speed and carrying time of the elongated sheet going through each unit, because of this, it can prevent the crimpling, sagging, snapping, breakage, and damage of the elongated sheet carried from each unit. Also, the carrying speed of the elongated sheet in the unit of front end and that of rear-end unit could respectively be adjusted and controlled, not only variously adjust thickness of the nanofiber web laminated on the elongated sheet but also form uniform distribution of nanofiber web laminated on upper side of the elongated sheet. Moreover, nanofiber web matter could be improved, device operation convenience and nanofiber web product reliability could be enhanced. Even more, by automatically sensing and solving of the slacking of the elongated sheet, uniformity spinning of nanofiber due to the elongated sheet carrying problem is prevented, and thereby high quality nanofiber with uniform matter can be manufactured.

[0044]In addition, in the present invention, solving the problem of slowed carry of the elongated sheet caused by attaching to the collector, it prevents lack of uniformity spinning of nanofiber due to the elongated sheet carry imbalance, moves the auxiliary belt in upper and lower direction, adjusts the distance with the spinning nozzle, effectively controls nanofiber stack amount, and manufactures high quality nanofiber with uniform matter. Moreover, based on permeability and thickness measured by the permeability measuring device and the thickness measurement device, enables to control the elongated sheet carrying speed and the nozzle block, and enables mass-producing of nanofiber having uniform permeability and thickness during long time electro spinning.

Problems solved by technology

However, in the electrospinning apparatus's each of the unit, in the case carrying speed of the elongated sheet on which a nanofiber web is laminated and formed is different according to each section, there are problems such as the elongated sheet is wrinkled, or slacked, etc.

In other words, in the case of carrying speed of the elongated sheet laminating forming a nanofiber web in the unit located at the electrospinning apparatus front-end and carrying speed of the elongated sheet laminating forming a nanofiber web in the unit located at the rear-end are different, there are problems such as the elongated sheet is wrinkled, or slacked, etc., and because of this, there are problems such as the elongated sheet is cut, or a property of matter is debased, or device driving is stopped.

In more detail, in the case of carrying speed of the elongated sheet laminating forming a nanofiber web in the unit located at the electrospinning apparatus front-end is fast, and carrying speed of the elongated sheet laminating forming a nanofiber web in the unit located at the rear-end is slow, there are problems such as the elongated sheet is wrinkled, or slacked.

On the other hand, in the case of carrying speed of the elongated sheet laminating forming a nanofiber web in the unit located at the electrospinning apparatus front-end is slow, and carrying speed of the elongated sheet laminating forming a nanofiber web in the unit located at the rear-end is fast, there are problems such as the elongated sheet is cut, or a device driving is stopped, and because of this, overall a nanofiber web's property of matter is debased.

Meanwhile, as stated above, when manufacturing a nanofiber using the electrospinning apparatus, spinning solution is consecutively supplied to a nozzle high voltage is applied to and there is problem such as provided electric force's effect is lowered.

So, Droplet phenomenon which spinning solution fell in droplet form is occurred, product quality is debased, and there is difficulty in nanofiber mass production which makes commercialization impossible.

However, electrostatic attraction is increased due to high voltage, the elongated sheet on which a nanofiber web is stacked is attached to the collector, only with the elongated sheet carrying device included in the electrospinning apparatus, it is hard to overcome such electrostatic attraction, so nanofiber cannot be mass produced.

Therefore, there are problems such as the process is complex and the cost is increased.

Meanwhile, when manufacturing nanofiber, in the case the elongated sheet attached to the collector is slacked, due to nanofiber uneven stack, there is problem such as the quality is decreased.

However, there are problems such as air pollutant attaches to an air outlet opening sending compressed air, diameter of a hole is changed, measurement error occurs.

However, because an elongated sheet tension is evaluated using a contact roller, there are problems such as pollution and modification of nanofiber property of matter as according to electro spinning direction, spin nanofiber contacts a roller.

However, since it is not easy to constantly maintain electro spinning condition for a long time, mass production of nanofiber with uniform air permeability and thickness is still difficult.

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