Wire-brush-type differential fusant electrostatic spinning device and method

Abstract

The invention discloses a filament-brush-type differential fusant electrostatic spinning device and a method. The device comprises a fusant conveying device, a fusant metering pump, an extruder head, a differential silk brush, a control system, a collection device and a high-voltage electrode device. The fusant outlet of the fusant conveying device is connected with the fusant inlet of the fusant metering pump. The fusant outlet of the fusant metering pump is connected with the extruder head. The differential filament brush is arranged between the extruder head and the collection device. The direct-current high-voltage electrode of a high-voltage electrostatic device is arranged at a position right below the base cloth of the differential filament brush. The differential filament brush consists of a thin metal sheet and saw teeth or filaments which are arranged at adjacent intervals. The saw teeth or the filaments are arranged in a single row or in a plurality rows in a staggering way. By introducing the differential filament brush, the spinning efficiency is greatly improved and the manufacturing and installation cost is reduced; and by controlling the temperature of the differential filament brush, the reduction of fusant viscosity is facilitated, the degradation is reduced, the traditional method of using a plurality of spray nozzles or capillary modules to improve electrostatic spinning efficiency is changed and the large-scale industrialization of electrostatic spinning is expected to be realized.

Description

technical field [0001] The invention relates to a large-batch melt electrostatic spinning method and device, belonging to the field of electrostatic spinning. Background technique [0002] Electrospinning is also called electrospinning. As early as 1930, the US patent US1975504 had reported the electrospinning method. In 1993, this technology was defined as electrospinning technology. The electrospinning process is to apply a high-voltage electric field between the nozzle and the receiving device at the supply end of the solution or melt, so that the charged solution or polarized melt forms a Taylor cone under the action of the electric field force, and then overcomes the surface tension to form a jet. , then sharply thins during the movement, and finally obtains the process of microfibers on the receiving device. [0003] Compared with solution electrospinning, melt electrospinning has the advantages of no solvent recovery, high safety, high spinning efficiency, and good m...

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Problems solved by technology

[0004] U.S. patents US006616435 and US20080241297 mentioned a device for the industrial production of non-woven ultrafine fibers by using multiple nozzles or spinnerets by electrospinning. This patent mainly proposes specific solutions and devices for the production of non-woven materials by the solution electrostatic method. The structure is complex; for solution electrospinning, Stanislav Petrik et al. of the Czech Republic proposed a nozzle-free electrospinning method for direct electrospinning on the free liquid surface, which realized the mass production of small-scale solution electrospinning, while for melt electrospinning, there is no nozzle. Due to the high limit voltage value of direct electrospinning on the free melt surface, it will break down the air and discharge before the spinning voltage is reached, so it is difficult to realize

At present, the batch equipment for melt electrospinning mainly focuses on the application of multiple nozzles and simple arrangement and integration. The manufacture and installation of hundreds of nozzles not only increases the cost, but also reduces the spinning reliability.

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