Applications PTFE micropowders

NBR containing irradiated PTFE micropowder for high performance tribological applications [23]. 

As seen in Fig. 10 the steel surface of the wheel is modified by PTFE-PA material. The surface morphology is the same as the disc surface (used the PTFE-PA-6 test specimen). The examined PTFE PA-6 material consisting of 15-wt% PTFE micropowder (= 8.1 vol%) has only a small volume content but the AFM picture shows nearly 50% of the area of low adhesion. This means a surface modification takes place during tribological application. PTFE particles are degraded, removed and distributed on the surface by wear and tear and fixated on PA... 

MP Injection molding Delrin 500P with 20% Teflon PTFE micropowder, with low-wear and low-friction properties Specialty friction and wear applications... 

APPLICATIONS FOR LOW MW PTFE (MICROPOWDER OR FLUOROADDITIVE) 609 used to create parts for use in the semiconductor industry include [24,25]... 

Micropowders, PTFE homopolymers with molecular weight significantly lower than normal PTFE, are commonly used as additives in a large number of applications where they provide nonstick and sliding properties. They are added to plastics, inks lubricants, and lacquers.14... 

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. 

As noted above, surface area is an important property for many micropowder applications. The only directly polymerized low MW PTFE available commercially is based on dispersion polymerization (high surface area) so either irradiated granular or thermally degraded PTFE is employed when a low surface area is preferred for the application. 

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