Polyester melt direct spinning method and system with online addition of functional modifier

Abstract

The invention provides a polyester melt direct spinning method by online adding functional modifiers. The melt with 5%-10%wt of conveying capacity is taken out on a melt main pipeline and enters a dynamic mixer, the functional modifiers are added, a functional melt is generated and returns to the melt main pipeline, and the functional melt and other melts on the main pipeline enter an efficient static mixer on the melt main pipeline and are mixed again to obtain the functional melt for spinning. The invention further discloses a polyester melt direct spinning system by online adding the functional modifiers. The melt with 5%-10% of the conveying capacity is taken out on the polyester melt main pipeline, so that production of the functional melt and production of polyester are relatively independent, the basic performance of the melt is consistent with that of a melt produced by large-scale polyester, the problem of poor uniformity of the functional melt is solved by mixing twice, a re-cooling and pelleting process of the melt is omitted, machining cost is greatly reduced, the heating capacity of the melt entering the dynamic mixer is reduced, and energy consumption is low.

Description

technical field [0001] The invention relates to a polyester melt direct spinning method and system with online addition of a functional modifier, and belongs to the technical field of synthetic fiber production. Background technique [0002] PET polyester production technology has developed rapidly since the 1990s. The polymerization scale of conventional direct spinning to produce short fibers has reached 900 tons per day, which can supply 4 to 5 direct spinning production lines respectively. The scale effect is obvious and the product quality is stable. The processing costs of polymerization and spinning are low. [0003] Entering the 21st century, there is a serious imbalance between supply and demand in the synthetic fiber textile processing chain worldwide, and the market competitiveness of conventional polyester staple fibers has seriously declined. [0004] During the same period, the research and development of functional polyester fibers achieved effective results....

AI Technical Summary

Problems solved by technology

[0008] The shortcomings of the above-mentioned technology are high processing cost, high energy consumption, high consumption, and the uniformity of the final fiber product is lower than that of conventional polyester staple fiber, and the implementation process is relatively complicated. Therefore, the functional polyester modified by this technology Polyester staple fiber has not yet become a growth point for the benefits of synthetic fiber enterprises

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