The Kroll & Ziller universal ePTFE-flat seal consists of pure virginal PTFE.
The manufacturing process, creating a microporous fibrous texture, has been especially developed. The macro – molecule shows a considerable ramification in the longitudinal and transverse direction. Due to this there exists a considerable resistance to tearing in the longitudinal direction and a much favourable flow behaviour (very low cold flow).
Simultaneously the material gets very soft and flexible, which is converted to a wear harden packing by pressing.