an alternate polymer extrusion method and system reduces “ drool ” effects that detract from precise control over the content of two or more materials in an extrudate along its length . in the system , two or more extruders direct melt to two or more gear pumps . control of the speed of the gear pumps controls the amount of each material emergent from the pumps , proceeding to a convergence in the paths from the pumps and thence to a die . melt in each path between each pump and the convergence tends to expand and drool into the convergence as its associated pump is slowed and stopped . to prevent this , in the die , a constriction in each path just upstream of the convergence greatly reduces drool past that point by requiring a much greater pressure to force the melt past the constriction . the increased pressure required increases compression and expansion of the melt between the pump and the construction as a pump starts or increases in speed , on one hand , and stop or decreases in speed , on the other hand . compensatory pump speed changes are made to counter this effect .