Method for continuous production of polyamide functional masterbatch and polyamide functional masterbatch

Abstract

The invention discloses a method for continuous production of a polyamide functional masterbatch and the polyamide functional masterbatch. The method comprises the following steps: continuously conveying a functional powder slurry predispersion prepared from water, caprolactam and a functional powder to a functional powder slurry multi-stage grinding device for grinding and dispersing; uniformly mixing an obtained functional powder slurry with a caprolactam melt and a catalyst through a dynamic mixer, adjusting the temperature of an obtained mixture through a heat exchanger, and allowing the mixture to enter a high-pressure hydrolysis reactor for a ring-opening reaction; removing excess water from an obtained functional masterbatch oligomer oligomeric melt through an oligomer melt dehydrator, and allowing an obtained product to enter a normal-pressure polymerization reactor for a polymerization reaction; and removing a caprolactam monomer from an obtained polyamide functional masterbatch melt through a film evaporation devolatilization system, and directly carrying out pelletization molding so as to obtain the polyamide functional masterbatch. The functional powder in the polyamidefunctional masterbatch continuously produced by using the method provided by the invention is dispersed in a highly uniform manner, so the polyamide functional masterbatch provided by the invention is applicable to production of products like high-quality fibers and films.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a method for continuously producing polyamide functional master batches and the polyamide functional master batches. Background technique [0002] At present, the preparation method of polyamide functional masterbatch is mainly the pre-spinning coloring method of functional masterbatch. Functional masterbatch is an aggregate prepared by uniformly loading super-normal pigments or dyes in resin. The preparation of functional masterbatch usually adopts the melt blending method, and the carrier resin and functional powder are uniformly mixed above the viscous flow temperature of the carrier resin, relying on the strong shear force provided by the mixing equipment, so that the functional powder can be stabilized with a certain particle size. , Evenly dispersed in the carrier resin. Since in the melt blending method, the dispersion of the functional powder in the h...

AI Technical Summary

Problems solved by technology

Since in the melt blending method, the dispersion of the functional powder in the high-viscosity carrier resin melt mainly depends on the mechanical shear force provided by the mixing equipment, it is difficult to realize the functional powder in the carrier resin melt at a small scale height. Uniform dispersion, which makes it difficult for the functional masterbatch prepared by the melt blending method to be suitable for the preparation of fine denier or ultrafine denier functional fibers

Images