poly(ethylene-co-tetrafl uoroethylene)

Poly(ethylene-co-tetrafluoroethylene), commonly known as ETFE, is a fluoropolymer copolymer combining ethylene and tetrafluoroethylene units, offering a balanced combination of chemical resistance, temperature stability, and mechanical toughness. It is widely used in chemical processing equipment, wire and cable insulation, tubing, and architectural applications where moderate chemical resistance and low permeability are required; engineers select ETFE over lower-cost polyethylene when superior chemical resistance is needed, or over more expensive perfluorinated fluoropolymers when high temperature performance is less critical or cost must be controlled.