Abstract: PU/PVDF nanofibrous membranes were successfully prepared by electrospinning in this paper. By changing of the mass ratio of solute, it could be seen that it had great effect on morphology, diameter of the spun fibers and the contact angle of fiber membrane. In this study, PU/PVDF membrane with optimum parameter was explored. After that, press the membrane and polyester cloth together by selecting one-component polyurethane adhesive of optimum concentration through electrospinning, and its waterproofness, breathability and other performances were investigated. The results showed that the optimum process for electrospinning of PU/PVDF membrane were, the mass ratio of solute of PU/PVDF 7/3, voltage 14 kV, traveling distance 10 cm, concentration 12 wt% and volume ratio of component solvents of DMF/Acetone 4/6. The distribution of adhesive appeared as micron spot or block on the surface of polyester cloth. In addition, its cohesiveness and breathability were better when the concentration of adhesive was about 40 wt%. With the increasing of thickness of PU membranes, the waterproof values, the breathability and breaking elongation of compound fabric were worse while its breaking strength was better，and it had a similar humidity resistance with PU/PVDF membranes’.

Key words: electrospinning, polyurethane∕polyvinylidene fluoride nanofibrous menbrane, composite fabric, waterproofness and permeability, stretchability