in the materials employed as specified and claimed herein state of the art computerized production lines for the manufacture of needle punched carpets typically start with the provision of a raw material resin in the form of pellets from rail hopper cars and transferred for storage until fed into the production line in silos the first step in the production process is extrusion and spinning in the case of polyester the resin material is crystallized and dried before extrusion the resin is usually blended uniformly in molten state with color pigments and other additives the molten blend is extruded and flows under pressure through spinnerettes the denier and shape of the fiber is determined at this point the next step involves drawing and annealing the fiber during drawing individual filaments are mellowed with heat stretched and annealed to achieve the elongation characteristics and strength required in a subsequent step after drawing the fiber is crimped to a u201c z u201d shape for fiber cohesion heat set and cut to the desired length cut fibers are baled and if necessary are blended in certain proportions with other fibers appropriate for a specific fabric in production these bales of prepared fibers can then be opened and broken into clumps of fiber in hoppers designed to achieve a uniform fiber dispersion the needle punch operation begins with a carding operation where.