DOUBLE LAYER STRUCTURE POROUS GLASS MEMBRANE AND METHOD FOR MAKING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a porous glass membrane capable of exhibiting high fractionating accuracy and good transmission. SOLUTION: The double layer structure porous glass membrane has a porous glass layer comprising a double layer structure of a porous glass layer as a skin layer and a porous glass layer as a supporting layer, wherein, the average pore sizes of each layer are different from each other.