PROCESS OF MAKING ANISOTROPIC SEMIPERMEABLE MEMBRANE

摘要

A process of making a semipermeable membrane includes charging a polymer solution to a spinneret feed vessel (1) positioned within a large chamber (3) and agitating with a paddle mixer (5). Heat is supplied by heat transfer fluid through coils (7). Polymer solution is discharged through a bottom outlet (9) through a spinneret (11). A gas or liquid core fluid is supplied through a line (13). Spinneret (11) is located above a discharge conduit (15) which extends below the surface of a quenching bath (17) contained within a quench tank (19), which also contains immersed takeup rolls (21, 23).