A chemical fiber spinning cooling system and its application

Abstract

The invention discloses a chemical fiber spinning cooling system which comprises a refrigeration device, an atomization device and a circular blow device. According to the cooling system, a water mist cooling technology is applied to chemical fiber spinning cooling; by combination with the advantages that the water cooling efficiency is high and an outer circular blow device performs cooling evenly, through exquisite design of the circular blow cooling device structure, chemical fibers are cooled more effectively but not too fiercely, the cooling efficiency is higher; particularly for production of fibers with diameters of 0.05-0.1 mm (about 20-85 dtex), the chemical fiber spinning cooling system is more favorable for improving production efficiency; the spinning speed can be improved to 150-400 m / min, and the chemical fiber spinning cooling system improves the spinning speed by over 5 times compared with water cooling spinning.

Description

technical field [0001] The invention relates to a cooling system and its application, in particular to a chemical fiber spinning cooling system and its application. Background technique [0002] In the melt spinning process of polymer slices, the sliced ​​particles are dried and dehumidified, heated and melted in a screw extruder to form a polymer melt, and then metered by a melt metering pump, from the spinneret of the spinning assembly hole extrusion. For the production of different varieties, the number of holes in a component spinneret is generally 10 to 500 holes. The thin stream of melt extruded from the spinneret hole needs to exchange heat with the flowing cooling medium in the cooling environment, so that it can be cooled and solidified from a molten flow state in the shortest possible time to become a solid filament. The cured filaments are drawn, shaped, wound (or cut) to become the final product. The cooling and solidification process of the filaments is close...

AI Technical Summary

Problems solved by technology

However, the spinning speed of this method is low, generally around 30-70m / min

Moreover, the water-cooling method is not suitable for high spinning speed, because the speed increases, the length of the water tank increases correspondingly, and the moisture carried out by the filaments increases greatly, and even causes water splashes to affect normal production.

In addition, improper control of the water temperature in this cooling method can easily lead to sudden cooling, which will cause the skin-core structure of the primary filament, which will have a negative impact on the post-processing performance and filament quality.

Therefore, for fibers with finer fineness (less than 85dtex), the water cooling process will result in slow spinning speed, low production efficiency and high production cost.

In order to improve production efficiency, the number of holes in the spinneret can only be increased to make up for it, which increases the possibility of fiber-to-fiber fineness differences, and also makes the spinning operation in the subsequent process more difficult, and the end-break rate also greatly increases

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