DRY COMPOSITE SEPARATION MEMBRANE AND DRY COMPOSITE SEPARATION MEMBRANE ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide a dry separation membrane and a dry separation membrane element where the surface protective layer of the separation membrane is applied and a high water production amount and high separation removal performance are maintained.SOLUTION: In a dry composite separation membrane provided with a base material, a porous support layer laminated on one surface of the base material and a separation function layer laminated on the porous support layer,: a moisturizing component is contained in the porous support layer; the separation function layer side of the dry composite separation membrane is coated with a hydrophilic polymer; and the thickness of coating is 0.6-10 times of the height of the functional layer portion of the dry composite separation membrane.