G. PU/UR Polyurethane Rubber Seal Ring Series

PU/UR rubber, also known as polyurethane rubber, has high wear resistance (the best of all rubbers), good strength, high elasticity, low temperature resistance (minimum -50 degrees Celsius), high tearing, high friction coefficient (≥ 0.5 ), and The advantages of aging, ozone resistance, radiation resistance and good electrical conductivity are incomparable to ordinary rubber.

In addition, polyurethane rubber has good oil resistance and chemical resistance, and UR has low affinity with non-polar mineral oil. Virtually impervious to erosion, much better than general purpose rubber and comparable to nitrile.

The disadvantage is that it has a large swelling property in alcohols, esters, ketones and aromatic hydrocarbons, and it is not resistant to hydrolysis.