Patent ID: 6413070
Filing Date: 2002-07-02
Classification: B01D,B29B,B29K,B32B,D06N

Abstract:
A system for manufacturing three-zone microporous membrane, the system comprising:at least one vessel for containing a ternary phase inversion polymer mother dope; a dope processing site; at least one pressure means, operatively connected to the at least one vessel, and the dope processing site for moving the dope from the at least one vessel to the dope processing site; a dope transportation system, operatively connected to the at least one vessel and the dope processing site, for transfer of the dope from the vessel to the dope processing site; at least one thermal manipulation means, operatively connected to the at least one vessel and the dope processing site, for transforming the dope from the at least one vessel into any one of a plurality of different possible pore size producing dopes; and at least three dope application means, operative at the dope processing site and operatively connected to the at least one thermal manipulation means, for applying the dope at the dope processing site to form three-zone microporous membrane.