To be honest: The long-term operating temperature of ordinary PE release film is usually around 60-80℃. If the temperature exceeds 80℃ and lasts for a long time, the PE film will become soft, shrink in size (usually by 1-3%), and even become sticky.

Curing in a 60-80℃ oven. If the time is within half an hour, most PE release films can withstand it. But you need to pay attention to two points: First, the size of the PE film may shrink under high temperature. If your product has high requirements for size accuracy, this shrinkage rate may cause problems; Second, high temperature may cause the silicone oil layer to further solidify, and the release force may change - sometimes it becomes lighter and sometimes heavier, depending on the specific silicone oil system.

Your advice: Inform the supplier of your actual temperature and time conditions, and request them to provide the data on peel strength and size changes after thermal aging. Do not make guesses on your own. If your process temperature exceeds 100℃, it is recommended to directly abandon PE and switch to PET release film. If the temperature is below 80℃ and the time is not long, PE release film is a very cost-effective choice. Additionally, PE performs well at low temperatures and retains flexibility even at extremely low temperatures, which is an advantage over PET.