... step condensation of 1, 4-butylene glycol and succinic acid. Polybutylene succinateBiodegradable plastic——True green ... fake biodegradableplastic. It is the true green and environment friendly material.CharacteristicsPBS is crystallized biodegradable ... and Soft Tube) Blister molding grade (Inner Package, Tableware) FiberIt can be used in packaging, tableware, engineering, medicine, agriculture, releasing ...