PBS（Polybutylene Succinate Series）

The main raw materials are succinic acid and butanediol. They undergo esterification to form an ester intermediate, followed by polycondensation to obtain biodegradable PBS polyester. It is primarily used in packaging materials, films, sheets, and other fields.

Production facilities are categorized into batch and continuous types. The batch type mainly includes double-reactor and triple-reactor systems. Continuous production primarily employs a four-reactor process, with ultra-high molecular weight varieties requiring additional or high-viscosity continuous polycondensation reactor units.