COMPOSITE MEMBRANE AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a composite membrane using polyvinylidene fluoride resin having virus removal performance and antifouling performance which is excellent in a separation function layer in order to stabilize the water quality of permeated water by improving a separation function in comparison with a conventional water treatment membrane and a method of manufacturing the composite membrane.

SOLUTION: There is provided a coat layer formed of polyvinylidene fluoride resin containing 9 wt.% or more and 46 wt.% or less of cellulose ester and a melt viscosity of 3,300 Pa s or more on a supported membrane, wherein the outermost surface pore diameter of the coat layer is 0.01 μm or more and 0.1 μm or less on average, and the wall of the coat layer is formed with a three-dimensional network structure whose average pore diameter is 0.01 μm or more and 0.5 μm or less, and whose thickness is 10 μm or more and 120 μm or less.

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