PO

Polyurethane rubber is divided into two major categories of polyester type and polyether type, compared with the other rubber, have very good wear resistance, the tensile strength of the polyurethane rubber is the highest of all rubber, it has the oil resistance of NBR.

一般应用于物理机械性能要求高的产品，如耐磨制品、高强度耐油制品和高硬度高模量制品等。在液压与气动、采矿工业、土木工程、工程机械、纺织机械等行业中都有广泛应用。

1. 聚酯型：有油膜工况下的往复运动密封件，适合于高压或超高压低速油缸。

2. 聚醚型：耐低温、耐水解性较聚酯型好。