ELECTROSTATIC SPRAY DEVICE

摘要

Disclosed is an electrostatic spraying device being configured and disposed to electrostatically charge and dispense a liquid composition from a supply to a point of dispersal, wherein the device comprises: a reservoir configured to contain the supply of liquid composition; a nozzle (250) a channel disposed between the reservoir and the nozzle; a high voltage electrode (430) being electrically connected to the high voltage power supply; a portion of the high voltage electrode (430) being disposed between the reservoir and the nozzle (280) and a nozzle pathway (300) disposed between the charging location (310) and the nozzle (280); the length of the nozzle pathway (300) governed by the following relationship: Vo / d < 4,000; wherein Vo is an output voltage (v) of the high voltage power supply; and d is the length (mm) of the nozzle pathway; wherein the nozzle pathway (300) comprises an outlet path disposed adjacent the nozzle (280), the outlet path having a diameter of from about 0.1 mm to about 1 mm and being a point or having a length of from about 0 mm to about 5 mm; and a main path disposed between the outlet path and the charging location (310), the main path having a diameter greater than the outlet path to about 5 mm and being straight or outwardly tapered towards the charging location at an angle of from about 0 to about 10 degrees; and/or wherein the high voltage electrode (430) comprises an antenna for facilitating flow of the liquid composition in the nozzle pathway; the antenna projecting at substantially the center of the nozzle pathway and having a basal diameter of from about 0.5 mm to about 7 mm, and a height of from about 0.5 mm to about 7 mm.