| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a porous filter having excellent air permeability and excellent filtering effect. <P>SOLUTION: This porous filter can be manufactured by immersing a cloth-shaped base material in a solution containing at least one substance selected from the group consisting of chitin, chitosan and their derivatives and then in another solution containing at least one substance selected from the group consisting of alginic acid, alginate, carrageenan, chondroitin sulfate and carboxymethyl cellulose. <P>COPYRIGHT: (C)2004,JPO |
