Most of the floating oil seal materials currently used at home and abroad are polymer elastomers. Under some special conditions, plastics and various metals are also used. However, no matter what kind of material it belongs to, it should have the following properties: It has certain mechanical and physical properties: such as tensile strength, tensile strength, elongation; it is compatible with the working medium, and it is not easy to swell, differentiate, and harden; Certain elasticity and hardness are suitable, and the shrinkage and permanent deformation are small; it has the aging performance of high temperature and low temperature resistance; it has abrasion resistance and certain tear resistance.

Hydraulic oil is used as a working medium in the hydraulic transmission system, which plays the role of energy transmission, transformation and manipulation. At the same time, it also plays the role of smoothing, anti-corrosion, anti-rust and cooling of various parts in the hydraulic system. The floating oil seal in the hydraulic system plays a role in preventing fluid from leaking between the contact surfaces, maintaining pressure, and maintaining energy transfer or transformation.

The selection of floating oil seals should be based on the working environment, such as temperature, pressure, medium and movement methods, to select suitable floating oil seal materials, and to meet certain needs through the development of a cooperative formula of materials. Or choose two or more materials, composite or combined layout to carry forward their respective advantages and achieve higher performance.