Wearable rubber parts for fluid handling services including a polyurethane inner layer

摘要: Wearable rubber parts for fluid handling systems include a four layer structure, wherein the inner most of structure is polyurethane layer. The can be millable polyurethane. used in produced by reacting diisolcyanate with polyester and/or polyether polyols and chain extender. wearable part an expansion joint, pinch valve, or hose.