??Urethane rubber O-ring

??With the continuous development of the polyurethane industry, more and more industries and businesses to use polyurethane, rubber products industry in the rubber O-ring to be useful for the polyurethane material, polyurethane PU is polyamino urethane for short. It refers to the main chain structure containing high molecular urethane elastomer repeating unit chain links. Polyurethane materials, use very wide.

??PU rubber O-ring can be divided into seven categories: ultra-wear-resistant, self-lubricating; ultra-high rebound; high shock absorption; slow rebound, sound absorption; high temperature 130 degrees -150 degrees, burning smoke; high hardness 96D ± 2D; special antistatic.

??PU rubber O-ring is not planning to hurt, no noise, long life, cost reduction, temperature at minus 20 degrees to 120 degrees temperature, polyurethane products non-polluting, non-toxic and tasteless.

??PU polyurethane rubber O-rings: polyurethane rubber is very good mechanical properties, wear resistance, high pressure performance are far superior to other rubbers. Aging resistance, ozone resistance, oil resistance is also quite good, but the high temperature easily hydrolyzed. Generally used for high pressure resistance, wear sealed areas, such as a hydraulic cylinder. General temperature range of -45 ~ 90 ?. PU polyurethane rubber O-ring is PVC mechanical strength three to four times, wear is five to ten times NR, NBR oil is one to five times, in addition, also has a number of outstanding overall physical and chemical properties such as: resistance to radiation, ozone resistance, dielectric properties, elasticity, elongation up to 500% (up to 1000%). PU polyurethane rubber O-rings and lower than CAN content nitrile rubber (NBR) and hydrogenated nitrile rubber (NBR) high pressure high abrasion resistance. And O-ring groove design should make O-ring groove clearance as small as possible. Actual operation, will inevitably encounter O-ring groove clearance is large, in order to avoid the O-ring is extruded into the gap, you should consider using anti-extrusion ability and good dimensional stability of the material made of O ring, such as polyurethane rubber O-ring.