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Why are there PTFE and Kynar- PVDF extended delivery times

In the last year, the business has experienced more challenges than I have seen within my 3 decades experience. In the past I have seen sharp price increases, and I have observed several shortages, and delivery delays stemming from resin allocations by plastic resin companies. This is the first occasion I have seen all these issues at one time. PTFE (TFE) and PVDF are both on allocation. These two resins are in short supply. The  PTFE Sheeting product PTFE (TFE) and also Kynar  manufacturing requires a mineral called Fluorspar that is mined in Mongolia and China. The worldwide requirement for this mineral has grown 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 dozens of applications from non-stick fry griddles to ptfe tape for home use. This specific mineral is a critical raw material inside the manufacturing of fluoropolymers,...