Low water absorption rate
The low rate of water absorption of PEEK adds to its appeal. This characteristic stands out in particular when contrasting PEEK to a material like Nylon: PEEK has an absorption rate that is closer to 0% than nylon, which has an absorption rate of around 6%. PEEK is dimensionally stable as a result, even in very humid or wet environments. This is a crucial characteristic for seals and bearings.
Extremely low CTE
Further increasing its thermal stability is its extremely low CTE (coefficient of thermal expansion). You can rely on it to maintain its shape and dimension, especially in applications where it is subject to sharp temperature changes. Seals and bearings must have a very low CTE, especially in the oil and gas sector.
PEEK is the best when it comes to manufacturing ability. It can be machined, extruded, injection molded, and compressed molded. PEEK can be used for short or long production runs as well as non-standard sizes and dimensions because it lends itself to a variety of manufacturing techniques. The material is unusually simple to fabricate and machine.
PEEK has the previously mentioned qualities as well as durability and a low wear rate. Additionally, PEEK exhibits very little toxic gas and smoke emission when exposed to flames and has a V-0 flammability rating. PEEK has exceptional thermal conductivity, which enables it to quickly conduct heat away when graphite is added to it. PEEK comes in a variety of grades, including ones designed specifically for bearings.