Abstract: A conventional dry van trailer is modified to include a recessed bulkhead at the back of the trailer having a material inlet that communicates on its exterior side with a flexible fill tube and on its interior side with a rigid distribution conduit. The distribution conduit extends along the top wall of the trailer to an open free end near the front of the trailer. A bottom-opening distribution slot extends from the open free end of the conduit rearwardly along a substantial length of the trailer. The fill tube is connected to a grinder/blower unit which delivers a high velocity flow of ground plastic scrap into the tube and conduit is discharged therefrom through the open end and distribution slot of the conduit in a manner to fill the trailer from front to back. A two-stage coarse/fine filter permits air to escape from the trailer while retaining the solid material.