SEPARATION MEMBRANE AND METHOD FOR PRODUCING SAME

摘要

Disclosed is a separation membrane comprising - an elongated substrate having fluid permeability and a separation layer formed at the surface of said substrate - wherein the aforementioned separation layer comprises a predetermined thickness section having a predetermined thickness and thin sections each positioned on the outside of both edges in the widthwise direction of said predetermined thickness portion and having a thinner thickness than the aforementioned predetermined thickness, and there is a separation-layer-lacking section, at which only the aforementioned substrate is present and the aforementioned separation layer is absent, between the outside edges in the widthwise direction of each of said thin sections and the outer edges in the widthwise direction of the aforementioned substrate. The separation membrane can be produced by using coating bar having a protrusion on both the left and right ends of the surface that contacts a macromolecule solution for forming the separation layer.