Abstract: This invention is related to a thermoformed article containing a bendable region traversed by an electrical conductor, the electrical conductor comprising a substrate and a two-layer electrical conductor. The two-layer conductor comprises (a) a layer of polymer thick film silver conductor comprising a polymer selected from the group consisting of (i) a mixture of thermoplastic polyurethane and thermoplastic polyhydroxyether and (ii) a thermoplastic polyurethane having a percent elongation of at least 200% and a tensile stress necessary to achieve 100% elongation of less than 1000 pounds per square inch and (b) a layer of polymer thick film silver conductor comprising thermoplastic polyhydroxyether.

Abstract: This invention provides improved printed heaters for use in wearable garments. The improvement comprises replacing the single large area resistive material layer with a number of small patches of resistive material, i.e., replacing the single large area heater with a number of smaller individual heaters. Printing of the resistive material is facilitated since the area of each resistive material patch is greatly reduced. In addition, some embodiments enable the opportunity to provide a breathable heater.