The major
disadvantage of cellulose-based fibre production systems has been the pollution
associated with the process. Solvent-spun lyocell fibre production based on the
solvent N-methyl morpholine-n-oxide (NMMO) which is recovered and recycled
during the process is said to be environmentally friendly. The spinning
solution comprises crushed wood pulp added to an aqueous NMMO solution. Akzo
Nobel Fibres who developed the NewCell process is currently researching ways of
producing lyocell filament yarns, while Lenzing and Courtaulds who both have a
license from Akzo Nobel are continuing lyocell staple fibre production. Tencel,
Courtaulds' version of lyocell staple is, according to the company, stronger
than other cellulosic fibres, easy to blend and to process into yarns and
fabrics, easy to dye, dimensionally stable in washing and drying and
comfortable to wear.
Lennox-Kerr P., Tech. Text. Int., vol. 3, no. 10, Dec. 94-Jan. 1995, pp 18-23
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