PU-X Ring Hydraulic Rod Combination IUH Seal is a kind of polyurethane oil seal material. The reason why polyurethane oil seal is liked by many businesses is that polyurethane material is the best thermal insulation material in the world, and the main chain is a kind of polymer containing – nhcoo – repeated structural unit. It is polymerized from isocyanate (monomer) and hydroxyl compound. Because it contains strong polar carbamate group, it is insoluble in non-polar group, and has good oil resistance, toughness, wear resistance, aging resistance and adhesion. Materials suitable for a wide temperature range (- 50-150 ℃) can be made from different raw materials, including elastomers, thermoplastic resins and thermosetting resins. It is not resistant to hydrolysis or alkaline medium at high temperature.Excavators, loaders, graders, dump trucks, forklifts, bulldozers, scrap trucks, mining trucks, cranes, aircraft, tackles, agricultural machinery, logging equipment, etc.