Extrusion of low-d. polyethylene (PE-LD) in innovative extruder with double-cone disc zone was modelled to det. the characteristics of the PE-LD particles motion along with their velocity values, as well as min. and max. rates of shear and to generate vector maps of velocity inside the extruder in relation to the crevice between the disc width and the angular velocity. A comparison was made between the flow velocity, a shear rate and shear stress in single cone and double-cone zones. The numerical simulation was performed by using a com. software program.