Patent ID: 8303871

Claim:
A method for pelletizing materials which are otherwise difficult to pelletize in a pelletizer processing line including a pelletizer with an extrusion die, the method comprising the steps of: forming a melt of a material difficult to be pelletized; passing the melt through a heat exchanger located upstream of a cooling extruder to cool the melt in advance of said cooling extruder; directly passing said melt into and through the cooling extruder from said heat exchanger, said cooling extruder processing and mixing said melt to increase dispersive homogeneity of the melt and to further cool the melt to an appropriate temperature for extrusional pelletization; feeding the melt into said extrusion die of said pelletizer located downstream of said cooling extruder; pelletizing the melt into pellets in said pelletizer; and drying said pellets in a dryer.