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PVC is an extremely versatile material that is generally available as a dry blend. Prior to processing in the extruder, additives are blended into the virgin PVC in a heating/ cooling mixing unit. PVC compounds are sensitive to shearing and high temperatures, therefore they are gently processed on parallel or conical twin screw extruders. battenfeld-cincinnati also offers co-extrusion solutions and pipe dies for multi-layer applications, such as foam core pipes, which reduce material requirements.