Continuous cationic modified polyester production method and system for continuously producing cationic modified polyester melt and directly spinning polyester fiber

Abstract

The invention relates to a continuous production method of cationic modified polyester and a system for continuously producing cationic modified polyester melt and directly spinning polyester fibers. The method undergoes continuous esterification reaction and polycondensation reaction to produce cationic modified polyester Ester melt and side-cut slices, polyester melt can be continuously extruded into spinning system through melt pressure conveying pipeline for spinning, the system includes two-stage esterification reaction system, pre-polycondensation reaction system, final polycondensation reaction system, melt conveying system, spinning system and side-cut chip production system, in which the second esterification reactor adopts a horizontal sub-chamber reactor specially designed for the production of cationic polyester. The method and system of the present invention can realize continuous production of cationic modified polyester and realize direct melt spinning, improve the production efficiency of cationic modified polyester melt and fiber, help reduce production cost and stabilize product quality.

Description

technical field [0001] The invention relates to a continuous cationic modified polyester production method and a system for continuously producing modified polyester melt and side-cut slices. Background technique [0002] The existing polyester direct spinning technology has high requirements on process parameters such as temperature, pressure, and draft degree. However, the physical and chemical properties, spinning performance and usability of polyester after cationic modification have changed to some extent. Silk brings greater difficulties. Therefore, at present, intermittent polycondensation and chip spinning are generally used when spinning cationic polyester fibers at home and abroad. However, the chip spinning process is long, the capital investment cost is large, the energy consumption is large, and the production cost is high. In batch production, there will be deviations in temperature, pressure, raw material ratio, control conditions, etc. of each batch, and it ...

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Problems solved by technology

However, the chip spinning process is long, the capital investment cost is large, the energy consumption is large, and the production cost is high. The temperature, pressure, raw material ratio, control conditions, etc. of each batch of batch production will have deviations, and it is difficult to achieve consistency, resulting in product quality. unstable

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