![]() Extremely low CTEįurther increasing its thermal stability is its extremely low CTE (coefficient of thermal expansion). This is a crucial characteristic for seals and bearings. PEEK is dimensionally stable as a result, even in very humid or wet environments. 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%. The low rate of water absorption of PEEK adds to its appeal. Even in hostile environments, it has a well-deserved reputation for being stiff and strong. The tensile, compressive, and impact strength of PEEK is excellent and can be further enhanced by adding additives like carbon, graphite, and glass fibers. Additionally, it is hydrolysis-resistant. PEEK is unaffected by harsh chemical environments, including exposure to H2S (hydrogen sulfide). Chemical resistanceĪnother factor contributing to PEEK’s popularity in the oil and gas sector is its superior chemical resistance, which is on par with PPS. It keeps its qualities even after being repeatedly exposed to steam and hot water. It is perfect for the harsh thermal environments found in oil and gas applications because it maintains its essential properties under continuous service temperatures ranging from cryogenic up to 500☏. PEEK performs well even at very high temperatures. Ability to perform at extreme temperatures It is ideal for use in the petrochemical sector thanks to these qualities. The company has over 60 years of experience as a designer and manufacturer for major international OEM’s in hydraulic and pneumatic industries as well as for automotive, HVAC and medical industries.PEEK is a high-performance engineering polymer that is frequently used for seals and bearings in some of the harshest, most aggressive service environments you can imagine. Molding PEEK is a core expertise of MR&P. When molded of PEEK, the seals are highly resistant to thermal degradation as well as attack by both organic and aqueous environments. PEEK seals used in hydraulic and pneumatic applications have a proven record of success. In addition to costing less, requiring less assembly time and providing longer operating life, PEEK weighs 50 percent less than many metal components, an important consideration today’s product designs. Minnesota Rubber and Plastics’ PEEK thrust washers feature self-aligning extensions at each end that press fit quickly and accurately into the transmission assembly ring gears. Thrust washer component design also provides assembly benefits by removing the locating holes of the aluminum components that required riveting. Custom joint configurations molded into PEEK ring seals give designers new options to ensure optimal fluid control while facilitating assembly of components. PEEK seal joints can be added to a seal design to minimize leaks or to facilitate required fluid “pass through” when various mechanisms are actuated in a system. With PEEK seal rings designed by Minnesota Rubber and Plastics, durability is increased significantly while maintaining required performance levels. Load forces in transmissions generate heat, potential wear and abrasion. During operation, PEEK rings act as a rotating planetary carrier for helical shaped ring gears in transmission assemblies. PEEK components replace metal components in assembles requiring high performance seals in vehicle transmissions. ![]() ![]() Both PEEK designs have improved operating life over previous designs. PEEK molded components from Minnesota Rubber and Plastics include thrust washers (left) and hydraulic seals (right).
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