SEPARATION MEMBRANES AND METHODS FOR MANUFACTURING CAST PRODUCTS

Abstract

The invention refers to a separation membrane (10) with a separation layer (1) that forms at least one separation surface, in which the separation layer (1) is greater than or equal to 30% by weight of the polyester resin, and the separation membrane (10) satisfies requirement 1 below. (Requirement 1) In the case where the stored elastic modulus of the separation membrane (10) at 70°C is measured by a dynamic viscoelastic viscometer (tension mode, frequency: 1 and temperature increase rate: 5°C / min) is defined as AI, and the stored elastic modulus of the separation membrane (10) after treatment at 175°C, 120 seconds, and 2 MPa is defined as A2, the separation membrane (10) satisfies the correlation A2 / A1 >1.2.