Microporous piezoelectric electret film assembly roll-to-roll continuous polarization device and method

Abstract

The invention discloses a microporous piezoelectric electret film assembly roll-to-roll continuous polarization device and method. The device comprises a coiling system, a plurality of polarization elements and a direct current high-voltage power supply, wherein the direct current high-voltage power supply is electrically connected with each polarization element, and the length direction and the width direction of each microporous piezoelectric electret film assembly are respectively defined to be the first direction and the second direction. The polarization elements are distributed into a plurality of polarization element bars, all polarization elements arranged on each row of polarization element bars are uniformly ranged in the second direction, The polarization element bars are mutually parallel, and are uniformly arranged in the first direction to form a parallel polarization element line, and the coiling system drives the microporous piezoelectric electret film assembly to pass through a position under the parallel polarization elements at a uniform speed, so that the microporous piezoelectric electret film assembly roll-to-roll continuous polarization is realized. The device provided by the invention has the advantages that the structure is simple, the efficiency is higher, and the device is suitable for mass production. The invention also provides the roll-to-roll continuous polarization method of the device.

Description

technical field [0001] The invention relates to a polarization device and a polarization method thereof, in particular to a roll-to-roll continuous polarization device for a microporous piezoelectric electret film assembly and a roll-to-roll continuous pole of the microporous piezoelectric electret film assembly. Roll-to-roll continuous polarization method of the polarization device. Background technique [0002] Microporous piezoelectric electret materials are a new generation of non-polar functional materials that have emerged in recent years. Polarization methods for microporous electret films include corona charging, contact charging or electron beam charging, among which corona charging is the most common method. Corona charging has become the main charging method in electret research because of its simplicity and reliability, short electret time, controllable polarization temperature, injected charge density, and uniform charge distribution after polarization. The pr...

AI Technical Summary

Problems solved by technology

Needles or strings—the needles or strings of the roller electrode are arranged parallel to the surface of the roller, so that the area of ​​the corona polarization area is limited. In order to ensure a certain polarization time of the film, the polarization winding speed must be reduced, so that the efficiency is very high. Difficult to improve

Images