FILTER USING ALTERNATELY ADSORPTION MEMBRANE AND ITS APPLICATION

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive filter high in adsorption efficiency of smoke. SOLUTION: An alternating adsorption membrane 20 is formed on a glass fiber leaf 30. The alternating adsorption membrane 20 has the cave structure (porous structure) in which colloidal smoke particles S are possible to intrude and has the structure alternately laminating the PAH membranes having positive charge (A1, A3 and A5) and the PAA membranes (B2, B4 and B6). The smoke particles S intruded into the alternating adsorption membrane 20 are adsorbed physically by the coulomb force due to the PAH membranes or the PAA membranes and an aldehyde molecule is adsorbed chemically to the PAH membranes. When adsorption effect is deteriorated, physically adsorbed particles are eliminated and the filter is almost recovered by executing the washing with hot air or hot water.