Polyurethane

Polyurethane materials occupy an important position in today's sealing industry. Their temperature resistance range is not as wide as that of rubber elastomers, but they can melt at high temperatures, can be produced by injection molding, and can also be dissolved. Their swelling is smaller than that of rubber elastomers. They are mainly used to produce U/Y-rings for pistons or piston rods, as well as dust rings, combined seals, etc.