The method comprises the use of an extrusion die with primary and secondary feed holes and associated discharge slots, wherein extruded material exits {HEAD ~ the primary discharge slots} at {TAIL ~ a faster rate} than the secondary discharge slots 
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The method comprises the use of an extrusion die with primary and secondary feed holes and associated discharge slots , wherein extruded material exits { HEAD ~ the primary discharge slots } at { TAIL ~ a faster rate } than the secondary discharge slots
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH