| 摘要 |
A membrane in the form of a flat film, tubular film or hollow filament of synthetic polymers which has from 10 to 90%, by volume, of intercommunicating pores and a smooth surface comprising open pores, the proportion of openings in the surface amounting to from 10 to 90%, is produced by a process which comprises extruding a homogeneous mixture of at least two components, one component being a fusible polymer and another component being a liquid inert to the polymer and both components forming a binary system which, in liquid aggregate state, has a region of complete miscibility and a region with miscibility gaps, at a temperature above the dissociation temperature into a bath which contains the inert liquid of the extruded component mixture and which has a temperature and hardening the membrane formed in the form of a flat film, tubular film or hollow filament. |
