Jet yarn spinning machine for electrostatic-spun nanofibers and use method thereof

Abstract

The invention relates to a jet yarn spinning machine for electrostatic-spun nanofibers. The machine comprises a high-voltage static electricity generator, a liquid storage tank with a pressurizing device, a cross-flow air pump, a gathering unit, a spinning unit, a semicircular base, a buncher, a jet nozzle twister, a yarn guide roller and a winding mechanism. The jet yarn spinning machine integrates the functions of spinning, gathering, drafting, twisting and winding and can be used for continuously producing electrostatic-spun nanofiber yarn. The yield of electrostatic-spun nanofibers is greatly increased; and the twister is simple in structure and high in production efficiency. A nanofiber yarn forming method is simple in process and high in yarn yield, is applicable to multiple polymer spinning solutions and can realize the continuous batch preparation of nanofiber yarn.

Description

technical field [0001] The invention belongs to the field of textile machinery, and in particular relates to an air-jet spinning machine and a spinning method capable of continuously preparing electrospun nanofiber yarns in batches. Background technique [0002] China is the world's largest producer and exporter of textiles. However, due to the overall low technological content of the industry, rising costs, and the impact of the international financial and European debt crises, my country's textile industry is facing severe competition and challenges. China's textile industry is urgently More innovative products and technologies are needed, and nanotechnology provides a new way for my country's textile industry to upgrade traditional textiles. Among them, nanofiber non-woven mats prepared by electrospinning technology have been used due to their ultra-fine scale, high surface area and porosity. Show performance advantages in many fields such as clothing, biomedical, composit...

AI Technical Summary

Problems solved by technology

[0003] At present, there are some reports of electrospinning nanofiber yarn, such as the Chinese patent "Preparation method and device of electrospinning nanofiber yarn" (application number: 201110205027) Electrolyte is added to the polymer solution to increase the aggregation effect of the fibers. At the same time, a funnel-shaped pipe is used as the receiving device for electrospun nanofibers, and the cylindrical pipe at the back end of the funnel is tangentially evacuated to form a certain air flow field. The fibers are gathered to form nanofiber yarns. This method has a low gathering efficiency for nanofibers, cannot obtain continuous nanofiber yarns, and has no twisting effect.

The Chinese patent "Preparation Method of Nanofiber Filament Bundle" (Application No.: 200510038571.5) uses oppositely placed metal needles to connect the positive and negative electrodes respectively, and the fibers ejected from the two needles attract and collide with each other in the air to form composite nanofibers. Stretching and winding onto a rotating drum to form a nanofiber tow, in which the fibers in the filament tow are continuous and well-arranged but without twisting, not strictly a yarn

Dabirian (Dabirian F, Fibers and Polymers, 2011, 12, 610) and Ali (Ali U, Journal of the Textile Institute, 2011, 103, 80) further configured a rotating metal disc between two needles with opposite polarities Or horns are used to gather and twist fiber bundles to achieve continuous yarn formation of nanofibers, but these methods are based on traditional single-needle electrospinning systems, which have low output (0.1-1g / h) and low yarn fineness. Small, limited by unstable spinning, no potential for industrial application

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