A melt differential electrospray spinning device and process for preparing nanofibers in batches

Abstract

The invention discloses a differential melt electro-blowing spinning device and technology for preparing nanofibers in batches, and belongs to the field of electrostatic spinning. The device mainly comprises an extruder, a filter screen, a melt metering pump, a spinning manifold, an airflow heating device, an air compressor, an upper plate electrode, a lower plate electrode, a high-voltage electrostatic generator, a guide air knife, a hot rolling device, a receiving device, a screen spreading belt and an air draft system. An outlet of the extruder is connected with the filter screen, and the melt metering pump is connected between the filter screen and the spinning manifold through a flange. Airflow is divided into two portions through a flow divider to be connected to the spinning manifold; after melt is divided and guided in flow through the spinning manifold, a thin uniform-flowing melt layer is obtained at the lower end of a wavy flow guide plate; under the high-voltage electrostatic action, the melt layer forms a plurality of Taylor cones in a self-organization manner, the Taylor cones are stretched and split continuously under the conditions of high-speed airflow and high-voltage electrostatics, and superfine fibers are formed at the receiving end of the screen spreading belt by means of curing. By the aid of the device and technology, difficulties of high viscosity of polymers, low yield, complicated devices and the like are overcome, and industrial production of differential melt electro-blowing spinning can be achieved.

Description

technical field [0001] The invention relates to a melt differential electrospray spinning device and process for preparing nanofibers in batches, and belongs to the field of electrospinning. Background technique [0002] The melt-blown spinning process is a process in which a high-speed hot air flow is used to draw a thin stream of polymer melt extruded from the spinneret hole of the spinning box, thereby forming ultra-fine fibers and collecting them on the condensation screen or roller; The melt differential electrospinning process is to apply a high-voltage electrostatic field between the differential nozzle and the receiving device, so that the polarized polymer melt overcomes the surface tension under the action of the electric field force, forms a jet on the end face of the differential nozzle, and flows on the receiving plate. The process of obtaining microfiber. The differential nozzle means that the nozzle evenly subdivides the melt, and the melt is firstly distribu...

AI Technical Summary

Problems solved by technology

However, the melt blown technology of these companies is based on their extremely harsh preparation process and mold materials, and to a certain extent, the spinning efficiency is sacrificed. By assembling more spinning boxes to achieve a certain spinning efficiency, it greatly increases Equipment cost and maintenance cost

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