A Uniform Electro-Thermal Film For Electronic Clothing

Traditional printed elastic heating films are notable for providing active and controllable heating effects. But wires, cables, or large batteries lead to electron concentration at the power input and output ends, resulting in hot spots or poor signal quality. Using electronic clothing (E-textile) over extended periods can cause burns to the user's skin. In severe cases, excessive noise and impedance generated by the circuit may cause circuit backtracking, leading to an overload of the temperature sensing system in the controller. This can result in controller burnout and additional safety concerns. To address these issues, this study employs two types of elastic conductive slurries with various resistance characteristics (carbon slurry and silver slurry) in conjunction with a screen-printing process for precise alignment and presents a new printed electric heating module with uniform heating effects. Specifically, a new layer-by-layer stacking technology is utilized in this study to reduce the interface resistance between various materials, resulting in a more stable and efficient heating module. The temperature difference between the environment and the electrode decreased from 13.34°C to 3.12°C, the temperature difference in heating areas decreased from 24.36% to 19.26%, and the average temperature increased from 41.10°C to 46.20°C.