Abstract: A tribocharge applicator device for application of a powdered material to a substrate is disclosed. The device includes an inlet for pressurized conveying gas, an inlet for powdered polymeric material having a first dielectric constant, a mixing chamber, a discharge barrel and a charge module. The charge module includes: at least two spiral charging elements disposed inside and coaxially aligned with respect to the barrel, each spiral charging element comprising an elongated sheet of a different material having a second dielectric constant. The proximal end of the elongated sheet is twisted about its longitudinal axis with respect to the distal end such that each longitudinal edge of the sheet forms a spiral.