Abstract: Systems and methods are provided for separating materials, such as fluff and plastic found in disposable diapers. A separator unit is provided having an inlet for receiving the materials, means for separating the materials, and multiple outlets for each of the respective materials. In one aspect, the system is substantially pneumatic, and air is used to separate the materials. In some aspects, a shredder is provided for shredding the materials prior to separating, and balers are provided for baling each of the respective materials.