abstract |
An object of the present invention is to provide a separation membrane having a high membrane strength and elongation and containing cellulose ester as a main component, and a method for producing the same. The present invention has a structure including a phase having a cellulose ester and voids, has an average pore diameter R of 0.001 μm or more and 6 μm or less, and has a breaking strength (MPa) ÷ (100−porosity (%)) × 100. A separation membrane having a value of 40 or more and an elongation of 10% or more is provided. |