| 摘要 |
A hollow fiber membrane has a reinforcing structure with a plurality of reinforcing filaments embedded in the wall of the membrane. The reinforcing filaments may include warp filaments, which are substantially continuous along the length of the membrane, and one or more warp filaments, which extend obliquely between two or more warp filaments. The warp filaments may be in the form of a spiral, a zigzag or a set of discontinuous filament segments. The reinforcing filaments are not woven together, but they may be bonded at points of contact where they intersect each other. The bonding may be by heat, solvent, or UV-activation. The filaments may have an outer layer with a polymer that responds to the bonding method. The membrane preferably has an inside diameter to outside diameter ratio larger than 0.60. The reinforcing structure may be impregnated with a membrane dope in a continuous operation in which the reinforcing structure formation and dope impregnation are done one after the other at the same speed. |
