| 摘要 |
PROBLEM TO BE SOLVED: To provide a membrane being capable of removing airborne suspended substances, e.g. SPM, particle sizes of ≤10 μm, and having sufficient gas permeability and an air conditioning system using it. SOLUTION: An asymmetric membrane 13 has a porous layer 3 and a dense layer 5 adjacent to the porous layer 3. Both the layers 3 and 5 are composed of a polymer material, and the porous layer 3 and/or the dense layer 5 contains a filler. COPYRIGHT: (C)2009,JPO&INPIT |
