Functional polyamide and its continuous production method

Abstract

Disclosed are a functional polyamide and a continuous production method thereof. The method comprises: continuously conveying the functional powder slurry pre-dispersion prepared by water, caprolactam and functional powder to a functional powder slurry multi-stage grinding device for grinding and dispersing; the obtained functional powder slurry is mixed with caprolactam melt and The catalyst is mixed evenly by the dynamic mixer, and the temperature is adjusted by the heat exchanger, and then enters the hydrolysis reactor for ring-opening reaction; the obtained functional caprolactam oligomer melt is removed by the oligomer melt dehydrator and then enters the pre-polymerization reactor for Polyaddition reaction; the obtained functional polyamide prepolymer melt is dehydrated by the prepolymer melt dehydrator and then enters the post-polymerization reactor for polycondensation reaction; the obtained functional polyamide melt is successively pelletized, extracted and dried, A functional polyamide chip is obtained. The functional powder in the functional polyamide continuously produced by the method is highly uniformly dispersed, and is suitable for producing products such as high-quality fibers and films.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a functional polyamide and a continuous production method thereof. Background technique [0002] At present, the preparation method of functional polyamide is mainly the masterbatch method. The masterbatch method is to melt and mix the functional powder and the carrier resin to obtain a functional masterbatch with high functional powder content, and then uniformly mix the functional masterbatch melt and polyamide melt to obtain functional polyamide chips through extrusion granulation . In the process of preparing functional polyamide by masterbatch method, the dispersion of functional powder in high-viscosity polyamide melt mainly depends on the mechanical shear force provided by mixing equipment, so it is difficult to realize the dispersion of functional powder in polyamide melt. The high uniformity of dispersion makes the spinning performance and film pulli...

AI Technical Summary

Problems solved by technology

In the process of preparing functional polyamide by masterbatch method, the dispersion of functional powder in high-viscosity polyamide melt mainly depends on the mechanical shear force provided by mixing equipment, so it is difficult to realize the dispersion of functional powder in polyamide melt. The high uniform dispersion makes the spinning performance and film drawing performance of the prepared functional polyamide chips poor

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