POROUS MEMBRANE, METHOD FOR PREPARING THE SAME AND SHEET HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method of producing a sheet having a porous polymeric membrane with a desired pore size and thickness on a side of a base film. SOLUTION: The porous polymeric membrane having the desired membrane shape formed on the base film is obtained by applying a coating solution obtained by solubilizing a synthetic resin in more than one solvents having different solubility, or an oil-in-water type emulsion including the dissolved resin, and then spraying a poor solvent or a good solvent of the resin. The sheet produced by using a thermoplastic resin film as the base film is useful for a master for heat-sensitive stencil printing.