Abstract: From the long-term development point of view, the solvent process regenerated cellulose fibers will radically resolve the collision problem of land occupation between grain and cotton, and become a staple variety of future fiber materials. The Lyocell fiber will come into being about 300 thousand tons production scale worldwide in recent years, and move towards high speed developing period after quantity production of specialized cellulose pulp and solvent in the future. For alkali / urea aqueous solvents, the key point is to resolve the problem that the hydrogen bond formed in the coagulating process restricts the drawing orientation of the macromolecules. For cellulose carbamate / NaOH aqueous solution system, the technological parameters need to be optimized to reach the level of viscose fibers in fiber performance and technological economic indices. For ionic liquid solvent system, the functional fibers can be developed for the first stage. For phosphoric acid solvent system, the key point is to resolve the problem of degradation control and solvent recovery, in order to realize low cost and environment friendly production.

Key words: cellulose fiber, new solvent, survey, outlook