Polytetraflouroethylene (TFE) and PVDF both are experiencing long lead times.
Teflon product PTFE (TFE) as well as Kynar manufacturing requires a mineral called Fluorspar that's mined in Mongolia and China. The world requirement for this mineral has increased significantly, as well as the supply has tightened. PTFE materials have high heat resistance, excellent chemical resistance and incredibly low co-efficient of friction (slick) and is utilized throughout a great deal of purposes from non-stick fry cookware to ptfe tape for use at home. This mineral is actually the critical raw materials within the manufacturing of fluoropolymers, fluorolubricants and several refrigerants.This surge in demand mixed with general shortage of raw materials is responsible for a dramatic price increase (almost double within the last year), shortages, and we expect both these factors to continue in the near future. Foraflon