Hierarchy classification:

1. top of the aat hierarchies
2. Brand Names Facet
3. Brand Names (hierarchy name)
4. brand name materials

Anotations

Scope note:

A trademarked name for polytetrafluoroethyelene (PTFE) which was discovered by Roy Plunkett 1938 and first marketed as Teflon (TM) by DuPont in 1943. This fluorinated polymer is known for its resistance to adhesion, heat, oxidation, light, and chemicals. It is used chiefly for molding articles and for nonstick cookware.