1. High temperature resistance: PTFE film has excellent heat resistance. It can withstand high temperature up to 300 ℃ in a short time, and can be used continuously between 240 ℃ and 260 ℃ generally, with remarkable thermal stability. 2. Low temperature resistance - good mechanical toughness; The elongation of 5% can be maintained even if the temperature drops to - 196 ℃.