PTFE (TFE) and PVDF are both in short supply.

Teflon  product PTFE (TFE) and also Kynar-PVDF  manufacturing requires a mineral called Fluorspar that is mined in Mongolia and China. The world interest in this mineral has increased significantly, along with the supply has tightened. PTFE materials have high temperature resistance, excellent chemical resistance and very low co-efficient of friction (slippery) and is utilized throughout a great deal of applications from non-stick fry pans to ptfe tape for home use. This particular mineral is actually a critical raw materials inside the production of fluoropolymers, fluorolubricants and lots of refrigerants.This surge in demand coupled with shortage of raw materials has caused a dramatic price increase (almost double over the past year), shortages, and we expect both these factors to keep at it in the near future.

Foraflon