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Friction and Wear of PTFE Seal Materials

, and . Tribology 2000 - plus: Band 2, page 1443–1448. Ostfildern, Technische Akademie Esslingen, (2000)175.

Abstract

Shaft seals made from filled PTFE materials, so called PTFE lip seals, have been successfully used for decades in the chemical industry. Due to their chemical and thermal stabiIity, PTFE lip seals are successfully used instead of elastomeric lip seals in many automotive and hydraulic applications. This paper deals with fundamental tribological properties and effects of filled PTFE materials employed in rotary shaft seals, mainly on the basis of experimental work done in the authors' laboratory. The tribological components of a sealing system and the main influences on the sealing function are briefly surveyed. Furthermore, the test methods and test conditions used are described. The experimental results show that the fillers of the PTFE compounds, but as importantly the topography of the shaft, play an crucial role in fluid sealing.

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