Process for treating the outer-inner surfaces of a porous non-conductor

摘要

A process for treating outer-inner surfaces of a porous non-conductor, comprising steps of: placing said porous non-conductor between a pair of electrodes which are located opposite to each other and carry a dielectric layer on a surface facing the other electrode, respectively, so that said porous non-conductor is brought into contact with both dielectric layers without coming into contact with said electrodes; and then, applying an alternating current voltage having a frequency of about 0.1 KHz to about 100 KHz between said electrodes to thereby induce an electric discharge in voids contained in said porous non-conductor and sandwiched between a pair of said electrodes is disclosed.