Definition
A thin, electrically conductive material made of layers of graphite bonded together with adhesive, embedded in the leading edges of wings and tail surfaces to act as a heating element for electrothermal anti-ice and deice systems. When electrical current flows through the graphite layer, it heats up and either prevents ice from forming or breaks ice loose from the surface.
Plain English
A flat, layered sheet containing graphite that is built into the front edges of the wings and tail. Electricity flows through it to warm the surface and stop ice from sticking, or to crack ice off once it has formed.
Context Anchor
Seen in discussions of electrically heated airfoil anti-ice and deice systems, especially on wing or tail leading-edge surfaces.
Derivation
Graphite is a form of carbon that conducts electricity well and tolerates heat. 'Foil' means a very thin sheet. 'Laminate' comes from the Latin lamina, meaning a thin plate or layer, and refers to something built up from bonded layers. So the name describes exactly what it is: thin sheets of graphite bonded into a layered structure.
Why Pilots Care
Provides a lightweight, flexible heating layer on critical surfaces that removes ice without adding drag or significant weight.
Analogy
Think of the heated rear window in a car, where thin conductive lines warm the glass to clear frost. The graphite foil laminate works on the same principle, but spread across the entire leading edge as a continuous heating layer.
Intuition Check
Do not picture loose kitchen foil taped to a wing. In this context, “foil laminate” means a thin conductive layer permanently bonded into aircraft material.
Example Sentence 1
The aircraft's wing leading edges use a graphite foil laminate that heats up when the anti-ice system is switched on.
Example Sentence 2
During preflight the technician inspected the graphite foil laminate along the wing leading edge for any damage.