Eltech Engineers manufactures Corona Sheet Treater for Increasing Surface Tension. Eltech Engineers supplies precision engineered machinery and equipment like corona treatment systems, corona treatment equipment, static eliminators, induction cap sealing machines, ozone generators and static chargers. Corona Sheet Treater for Increasing Surface Tension is a very effective way to increase the adhesion of virtually any plastic material. Corona Sheet Treater for Increasing Surface Tension of the sheet / fabrics receptive to inks by inducing molecular changes in the surface of the films/sheets. Sheet type corona treatment is required to increase surface tension or improve the printability. Some substrates are corona-treated when they are manufactured.