A kind of preparation technology of regenerated semi-dull cationic fiber

Abstract

The invention discloses a preparation process of regenerated semi-dull cationic fibers, which comprises the following steps: (a) drying PET master batches containing titanium dioxide; pre-crystallizing and drying regenerated PET cationic slices; (b) drying the dried PET Blending of the masterbatch and pre-crystallized and dried regenerated PET cationic chips; (c) transport the pre-mixture to the screw extruder for heating and melting, and then send the spinning melt into the spinning box, and after metering by the metering pump Pressing into the spinning assembly for spinning to obtain primary filament bundles; (d) post-heating primary filament bundles, cooling with air blowing around them, cluster oiling treatment, and then performing pre-network, drafting and setting, Winding and forming treatment to obtain regenerated semi-dull cationic fibers. The process of the invention is simple and easy, and the prepared regenerated semi-dull cationic fiber has excellent physical properties and can meet people's demand for regenerated semi-dull cationic fiber fabrics.

Description

technical field [0001] The invention relates to the technical field of polyester fiber production, in particular to a preparation process for regenerated semi-dull cationic fibers. Background technique [0002] Compared with ordinary polyester fiber, the fabric made of cationic polyester fiber has bright color, good deep dyeing property, high color absorption rate, good light fastness and washing color fastness when dyed with cationic dyes, and good color fastness. Good compatibility of dyes during color dyeing, good stability in high-temperature dyeing baths, low staining on other fibers including ordinary polyester fibers, and no ring-staining phenomenon, etc., are more and more popular among consumers. favorite. However, due to the excellent chemical inertness of cationic polyester fiber, it is difficult to be degraded by microorganisms or air under natural conditions. A large number of waste cationic polyester fiber products have become a huge burden on the environment....

AI Technical Summary

Problems solved by technology

In addition, since the hydrolyzed slices will be hydrolyzed during melting, the molecular weight of the polymer will decrease, which will affect the quality of the filaments. Water will vaporize at high temperature, which will form air bubbles, which will easily cause spinning breakage or wool, and the hydrous slices are amorphous. structure, the softening point is low, and it is easy to cause ring knots and blockage in the feeding section of the screw, which affects normal production. Therefore, it is necessary to pretreat the raw material slices before spinning to remove the moisture in the slices, but the existing pre-crystallization drying During the drying process of the equipment, there is the problem of insufficient contact between the high-temperature drying gas and the slices, resulting in low drying efficiency and long drying time, which affects production efficiency

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