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

PTFE - Polytetrafluoroethylene  product PTFE (TFE) as well as PVDF  manufacturing requires a mineral called Fluorspar which is mined in Mongolia and China. The world demand for this mineral has grown significantly, and the supply has tightened. PTFE materials have high temperature resistance, excellent chemical resistance and really low co-efficient of friction (slick) and is utilized within dozens of purposes from non-stick fry pans to ptfe tape for personal use. This mineral is actually the essential raw materials inside the manufacturing of fluoropolymers, fluorolubricants and lots of refrigerants.This increase in demand paired with general shortage of raw materials is mainly responsible for a dramatic price increase (almost double in the last year), shortages, and we expect these two factors to keep at it in the near future.

Mechatec PVDF