| 摘要 |
<p>The membrane has a water permeability of at least 0.2 cm/min psi and comprises an open honeycomb structure and a skin integral therewith, the honeycomb structure and the skin both being of a polymer (such as a polyimide) having a glass transition temperature of at least 200 DEG C. The membrane is produced by casting a solution containing not more than 13% by weight of the polymer, into a quench liquid (such as water) which is a non-solvent for the polymer but miscible with the solvent.</p> |
