| 摘要 |
A porous tubular product, suitable for use as a vascular graft, is made by winding polymeric fibres on a mandrel while overlying fibres are simultaneously bonded together. In one embodiment, a viscous solution of a biocompatible polymer is extruded from a spinnaret to form a plurality of filaments which are wound on a rotating mandrel as the spinnaret reciprocates relative to the mandrel. The filaments are wet as they contact each other, so that on evaporation of the solvent the fibres become bonded to each other. Alternatively, molten thermoplastic filaments are extruded which on winding fuse to achieve bonding. |
