Flat membrane element and manufacturing method thereof

摘要

Even when a membrane sheet contains an inorganic material, the membrane sheet and a support plate are properly deposited by a laser emission. In a manufacturing method of a flat membrane element lapping a membrane sheet 10 performing solid-liquid separation on a support plate 20 supporting the membrane sheet 10 and emitting a laser 24 to a mutual joint portion to deposit the membrane sheet 10 and the support plate 20 , when the membrane sheet 10 contains an inorganic material, the support plate 20 is formed by a material having laser penetration and the laser 24 is emitted from the support plate 20 side to the joint portion.