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Asahi, Acrylic Fiber Plant, 25,800 MTPY, Tow and Staple Fiber Production

Description

  1. Overview
    1. Inventory number: E-5927
    2. Acrylic fiber plant for sale
    3. Capacity: 25,800 mtpy
    4. Technology: Asahi
    5. Products produced: continuous acrylic fiber (tow), cut fiber (staple)
    6. Asahi designed continuous acrylic fiber plant producing both tow and staple fibers
  2. Process Description
    1. Polymerization of feed material takes place in reactor vessels with pure water
    2. The resulting polymer is purified, dried and stored in preparation for dissolving in a concentrated solution of nitric acid
    3. The "dope" liquid formed is then cooled, filtered, and de-aerated in preparation for spinning
    4. The dissolved polymer is extruded through spinnerettes in a strong solution of nitric acid
    5. Spinnerettes are a stainless steel unit with many thousands of small holes
    6. As the polymer emerges from the holes it coagulates to form fiber filaments
    7. The solution of nitric acid mixes with a water solution which is pumped continuously around the spinning baths in which the spinning process takes place
    8. Once the filaments are formed they are carried on to be washed clean of the remaining nitric acid
    9. The fiber is then stretched to improve its strength and to transform it to a more "wool" like product
    10. Two separate drying and oiling processes are carried out to improve the anti-static properties and the process ability of the fiber
    11. The fiber is then set by steam heating to an exact temperature for a controlled time period, standardizing the dimensional stability and the dyeability of the fiber so that color is guaranteed during downstream dying
    12. The tow, which is a "rope" like fiber, is packed into bales
    13. Staple fiber is soft crimped and then cut to selected lengths before baling