Hydrophilic film and process for producing the same

摘要

This invention provides a hydrophilic membrane wherein a hydrophilic cellulose derivative of a number average molecular weight of 2000~8000 is adsorbed irreversibly to a hydrophobic membrane of an aromatic polymer.Since an amount of leaching substances is extremely small, the membrane can be used suitably in such fields as medical applications, electronics, etc. where even a quite small quantity of leaching substances from the membranes is limited especially small.