| 摘要 |
PROBLEM TO BE SOLVED: To provide a spiral membrane element which can enlarge an effective area of a composite semipermeable membrane, and hardly causes the lowering of inhibition rate resulting from the deformation of the composite semipermeable membrane.SOLUTION: A spiral membrane element comprises a composite semipermeable membrane 2 having a separation function layer on a surface of a porous support body; a laminate including a supply-side flow passage material 6 and a permeation-side flow passage material 3; a holed center pipe 5 wound with the laminate; and a sealing part 21 which prevent the merging of a supply-side flow passage and a permeation-side flow passage. A thickness of the porous support body of the composite semipermeable membrane 2 is 80 to 100 μm, the permeation-side flow passage material 3 is formed of a tricot fabric, and a width of a linearly-continuing groove is 0.05 to 0.40 mm.SELECTED DRAWING: Figure 1 |
