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

Teflon  product PTFE (TFE) as well as Kynar  manufacturing requires a mineral called Fluorspar that is mined in Mongolia and China. The world requirement for this mineral has grown significantly, as well as supply has tightened. PTFE materials have high temperature resistance, excellent chemical resistance and incredibly low co-efficient of friction (slippery) and is used throughout a bunch of purposes from non-stick fry pans to ptfe tape for personal use. This specific mineral is actually a critical raw material inside the manufacturing of fluoropolymers, fluorolubricants and many refrigerants.This increasing amount of demand linked with shortage of raw materials is mainly responsible for a dramatic price increase (almost double over the past year), shortages, and we expect these two factors to stay in affect in the near future.

Polystone PVDF