This whitepaper provides a comprehensive comparison between PTFE (Polytetrafluoroethylene) and other commonly used engineering plastics including PEEK (Polyether Ether Ketone), Nylon (Polyamide), Polyurethane, UHMWPE (Ultra-High Molecular Weight Polyethylene), and PVDF (Polyvinylidene Fluoride). The analysis focuses on key performance indicators such as chemical resistance, temperature tolerance, mechanical properties, and cost-effectiveness across various industrial applications.