Repro-PTFE

Sintered, unfilled PTFE-scrap resin is cleaned from all contaminant and milled into certain particle size classes, which can be reused, for example, in Ram extrusion applications. This so-called Repro-PTFE can also be mixed with virgin PTFE to a certain content such Repro-PTFE materials get specific designations [85] and are typically used for less demanding end-use applications. 

In some cases, used perfluorinated fluoropolymers (e.g., PTFE, PFA) are recycled by special cleaning processes and are ending up in the Repro-PTFE or micropowder-PTFE-market. Perfluorinated thermoplasts (e.g., PFA) are reused in applications where the quality requirements (e.g., lot traceability) are much lower. Overall, the lion s share of used fluoropolymers is, however, ending up in landfills, in incineration plants, or in blast furnaces. Communal waste incinerators can tolerate only very limited amounts of fluoropolymers due to the high corrosion due to hydrofluoric acid formed in the process. 

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