Spinning technologies

Asahi Chemical Industries (ACl, Japan) are now the leading producers of cuprammonium rayon. In 1990 they made 28,000 t/yr of filament and spunbond nonwoven from cotton ceUulose (65). Their continuing success with a process which has suffered intense competition from the cheaper viscose and synthetic fibers owes much to their developments of high speed spinning technology and of efficient copper recovery systems. Bemberg SpA in Italy, the only other producer of cuprammonium textile fibers, was making about 2000 t of filament yam in 1990. 

Capone, G. J., Wet-spinning technology. In Acrylic Fiber Technology and Applications, ed. J. C. Masson. Marcel-Dekker, New York, 1995, pp. 69 103. 

Hollow-fiber permeators, 26 22 Hollow fibers, 13 389-390 cellulose ester, 26 19 cellulosic, 26 18-20 ion-exchange, 26 15 mechanical considerations and dimensions for, 26 5-7 natural polymer, 26 23 polyacrylonitrile, 26 23 polyamide, 26 21-22 post-treatment of, 26 13-14 preparation of, 26 3 production of, 19 757 with sorbent walls, 26 26 technology of, 26 27 wet spinning of, 25 816, 817-818 Hollow-fiber spinning processes, 26 7-12 Hollow fiber spinning technology,... 

Spinnerets, for olefin fiber extrusion, 22 627, 630-631, 11 231-232 Spinner flasks, 15 691-692 Spinning. See also Solution spinning Yarn spinning technologies air gap, 11 209 of continuous-filament yarns,... 

Spunbonded processes, 17 463 Spunbonded structures, novel, 17 466 Spunbound fibers, 11 236, 240-241 Spun fibers, 16 18, 20 Spunlaced nonwovens, 17 507 Spunlace fabrics, production of, 17 516 Spun yarn, 11 177, 178, 250. See also Yarn spinning technologies crystalline structure of, 11 237-238 Spurrite (5-calcium disilicate monocarbonate)... 

See also Yarn spinning technologies Texture analysis... 

Nakajima, T., Advanced Fiber Spinning Technology, Woodhead, Cambridge, UK, 1994. 

According to the vendor, using the ROTAR system and Bio-Spin technology costs approximately 22 to 30 per ton of untreated material. The ROTAR system is a small-scale Bio-Spin unit (D22467J). 

R. Kirschbaum, J. L. J. van Dingenen, Advances in gel spinning technology and Dyneema fibre applications . Integration of polymer science and technology, 3 Rolduc Conf. Elsevier Amsterdam (1988). 

Processable conducting polymers, either by melt or solution means, are suitable for fabrication into the myriad of devices envisaged for these dynamic polymer systems. The nature of the fabrication process is necessarily determined by the performance required of the final product. However, the ultimate size and cost of the fabricated part are equally as important as the performance characteristics. In this section, we review some recent developments in the area of printing and fiber-spinning technologies that will impact the fabrication of conducting polymer devices in the future. 

---