This product is a polyester polyol based on ethylene glycol, 1,4-butanediol-adipic acid. Mainly used in the fields of polyurethane pipes, membranes, plates, sheets and other TPU products, the downstream products produced with this series of polyols as raw materials have the characteristics of high transparency, low color number, wear resistance, folding resistance, heat resistance, tear resistance, low temperature resistance and high mechanical strength.