Common Failure Causes in Polyimide Heater and How to Prevent Them
https://thermal-innovation.fotosdefrases.com/mica-heating-plate-design-basics-power-shape-sensors-and-control
Many heating problems look like a power problem at first. In practice, the cause may be contact, heat loss, sensor position, or poor fit. A polyimide heater works best when these parts are planned together