Patent ID: 8637583
Filing Date: 2014-01-28
Classification: D01D,D01F

Abstract:
1. A process for the manufacture of a fiber or foil comprising at least one optionally functionalized polymer with a high T g selected from the group consisting of poly(aryl ether sulfone) (PAES) comprising the steps of (aa) providing a solution comprising at least 50 wt. %, based upon the weight of the solution, of the polymer, and at least 20 wt. %, based upon the weight of the solution, of at least one halogen-free organic solvent (S1) for the polymer; (bb) pushing the solution through a nozzle; and (cc) introducing the solution into a coagulation bath comprising (cc1) at least one liquid (L1) in which the polymer is insoluble, and optionally (cc2) at least one organic solvent (S2) for the polymer, identical to or different from the organic solvent (S1), to form a fiber or foil.