Flash spinning equipment and spinning method thereof

Abstract

The invention discloses flash spinning equipment. The equipment comprises a box, a spinning nozzle, a steering board and a conveying device, wherein a spinning solution inlet is formed in one side ofthe box, the spinning nozzle is arranged on the spinning solution inlet, the steering board is arranged on the other side of the box and opposite to the spinning nozzle, and the conveying device is arranged on the bottom of the box; the equipment further comprises an air amplifier, the air amplifier is arranged between the steering board and the conveying device, and high-pressure air with a fiberbundle led out by the steering board enters from a compressed air inlet of the air amplifier. The invention further discloses a spinning method of the flash spinning equipment. The method comprises the following steps that a spinning solution is sprayed from the spinning nozzle to form the fiber bundle, by means of the air amplifier, secondary drafting is conducted on the fiber bundle, and even splitting is conducted to form a fiber web. According to the equipment and the method, by adopting the air amplifier to replace traditional electrostatic apparatus for fiber splitting, the effect thatthe equipment and the method are more energy-saving and safer is achieved, the diameters of obtained fibers are small, and the strength is high.

Description

technical field [0001] The invention relates to the technical field of nonwoven fabrics, in particular to a flash spinning device and a spinning method thereof. Background technique [0002] Flash spinning is a special case of dry spinning. The polymer rapidly forms fibers when the solvent flashes, also known as instant spinning. The spinning technology method is mainly: mixing the fiber-forming polymer with a solvent, the selected solvent has a boiling point lower than the polymer, and cannot dissolve the polymer at normal temperature and pressure; under the condition of pressure and heating, it can dissolve the fiber-forming polymer . When heated to a temperature slightly higher than the boiling point of the solvent, the polymer dissolves to make a spinning dope, which is then extruded from the spinneret hole and enters a low temperature (or normal temperature) and low pressure (or normal pressure) medium. The solvent suddenly evaporates, and the polymer cools and solidi...

AI Technical Summary

Problems solved by technology

This electrostatic production process has the following disadvantages: First, it is very easy to cause safety hazards, such as fires and explosions caused by static electricity; secondly, because the negative electrode and metal plate corona discharge are affected by conditions such as current stability, the stability It is difficult to control, resulting in different degrees of fiber opening and poor uniformity of web formation; again, it is difficult to control the stability of fiber drafting due to static voltage; in addition, due to electrostatic process, the speed of fiber coagulation is slow and the coagulation speed is not good. Regulation and so on are the existing problems of electrostatic flash spinning

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