Common Failure Causes in Polyimide Heater and How to Prevent Them
https://polyimide-heater.huicopper.com/improving-thermal-efficiency-with-the-right-mica-heating-plate-setup
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