The high temperature resistance of polyethylene is relative, its heat resistance temperature is above 100°C, but high molecular weight polyethylene can withstand heat up to 150°C. Polyethylene is often able to withstand higher temperatures during processing and storage. However, if polyethylene is continuously exposed to high temperatures, such as being heated in direct sunlight or exposed to electrical appliances, physical changes such as thermo-oxidative aging and cross-linking may occur, causing the material to become brittle, brittle, and gradually lose its original mechanical properties.
