Electrically active plaster for controlled application of active substances to surfaces, e.g. analgesics to skin, comprises substance reservoir, electrically-charged polymer, first electrode and adhesive, all permeable to the substance

摘要

Electrically active plaster for the application of active substances or precursors (4) to a surface, comprises a polymer layer (1) with permanent electrical charge or piezoelectric properties, an adhesive layer, a first electrode (all three layers being permeable to (4)), and a reservoir (2) for (4) on the other side of layer (1). Electrically active plaster for the application of active substances or precursors (4) to a surface, comprises: (a) a polymer layer (1) with permanent electrical charge or piezoelectric properties; (b) an adhesive layer; (c) a first electrode between (a) and (b) (all three layers being permeable to (4)); and (d) a reservoir (2) for (4) on the other side of layer (1). An Independent claim is also included for a method for using this plaster by applying a controllable d.c and/or a.c. voltage to the first and/or second electrode(s) (7, 8), optionally by means of electrical leads (11a, 11b).