Fiber manufacturer that is the content of a fiber of any long-chain synthetic polymer composed of at least 85% by weight of acrylonitrile units. Acrylic fibers are produced in two basic spinning (fling), dry and wet. In the dry spinning method, material be spun it solvent. After extrusion through a spinneret, the solvent evaporates, producing continuous filaments, which later was cut into staple, if desired. In wet spinning is spinning solution extruded liquid coagulation bath shaped threads, drawn by, dried and processed.