jim rozen writes:

Teflon? You maybe mean turcite, or rulon.

Plain PTFE would be a poor choice for a way bearing
surface IMO.

"Turcite" (not turcite) is just a brand name. My understanding is that
Turcite B is PTFE, and Turcite A or TA and TX or X are acetal-PTFE
copolymer. If you have some other information, I'd like to hear it.