Temperature control system to independently maintain separate molten polymer streams at selected temperatures during fiber extrusion

A temperature control system for use in a fiber extrusion process comprising:

• a spin pack including a spinneret to extrude fibers from molten polymer;
• a spin beam oriented adjacent the spin pack and including a means to heat the spin beam and at least a portion of the spin pack to a selected temperature range;
• a means for independently pumping a plurality of molten polymer streams from at least one polymer supply source to the spinneret, wherein the means for independently pumping comprises a plurality of pump chambers, each pump chamber including a pump disposed within the pump chamber, wherein each pump includes a plurality of outlets;
• a plurality of flow path sets, each flow path set being connected with a respective pump and including a plurality of flow paths that connect with the plurality of outlets of the respective pump so as to deliver molten polymer from the respective pump to the spinneret;
• and
• a means for independently controlling the temperature of each molten polymer stream flowing within the means for independently pumping within a selected temperature range prior to delivery to the spinneret.