Editing Polytetrafluoroethylene (section)

=== Composites ===
PTFE film is also widely used in the production of carbon fiber composites as well as fiberglass composites, notably in the aerospace industry. PTFE film is used as a barrier between the carbon or fiberglass part being built and, in breather and bagging materials, is used to incapsulate the bondment when debulking (vacuum removal of air from between layers of laid-up plies of material) and when curing the composite, usually in an autoclave. The PTFE, used here as a film, prevents the non-production materials from sticking to the part being built, which is sticky due to the carbon-graphite or fiberglass plies being pre-pregnated with [[bismaleimide]] resin. Non-production materials such as Teflon, Airweave Breather, and the bag itself would be considered F.O.D. (foreign object debris/damage) if left in layup.

[[Gore-Tex]] is a brand of expanded PTFE (ePTFE), a material incorporating a fluoropolymer membrane with micropores. The roof of the [[Hubert H. Humphrey Metrodome]] in [[Minneapolis]], US, was one of the largest applications of PTFE coatings. {{convert|20|acre|m2}} of the material was used in the creation of the white double-layered PTFE-coated fiberglass dome.