Polyurethane／montmorillonite nano-composites were synthesized

and then used for fiber spinning．The viseosity of the spinning solutions

dispersion of montmorillonite in cast films and drawn fibers

as well as the mechanical properties of polyurethane／montmorillonite fibers weie investigated．The results indicated that the viscosities of spinning solutions containing montmorillonite were lower than that of the pure polyurethane solution

and the viseosity of spinning solutions increased after standing 24 h at room temperature．TEM images showed that montmorillonite particles were dispersed at the scale from nanometer to micrometer in fiber matrix．Compared with pore PU fibers

the mechanical pmporties of polyurethane／montmorillonite composite fibers were not improved except that the elongation at break was sightly increased．