CoContinuous blends can achieve unique properties and microstructure for applications in light management, filtration, and drug delivery. This paper will examine the structure for three blends, one without a compatibilizer (PP/PS) and two with a compatibilizer (PP/PS/Kraton and (HDPE/PEO/PEx). These blends were compounded either on a twin screw extruder or a single screw extruder, then cast into a film by a chill roll with some extensional draw. Morphology was observed by SEM, solvent extraction, and LSCM (laser scanning confocal microscopy). We relate the structure and properties to processing conditions.