POK Material Guide for Dynamic Sealing & Sliding Parts | Grade Selection, Injection Molding & Applications 2026-08-13
Aliphatic Polyketone (POK / POKETONE) is a high-performance thermoplastic widely recognized as an upgraded alternative to POM and PA for dynamic sealing and sliding components. Compared with traditional engineering plastics, POK features ultra-low water absorption, excellent hydrolysis resistance, outstanding oil/grease resistance, low creep, high elastic recovery, low friction, and minimal stick-slip behavior.
These unique mechanical and tribological properties make POK the ideal material for hydraulic systems, fluid control equipment, and precision moving parts that require long-cycle dynamic operation and stable sealing performance.
Most importantly, all qualified POK grades and custom-modified POK compounds are fully injectable, supporting high-precision injection molding for mass production, as well as machining from extruded rods for prototype samples.
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