| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a spiral type separation membrane element reducing pressure loss and increasing a permeated liquid amount. <P>SOLUTION: This spiral type separation membrane element includes: a porous hollow tube 1 having a plurality of through-holes 2 leading from the outer peripheral surface to the inner peripheral surface; and a laminated body which is wound around the porous hollow tube 1, and includes a separation membrane and flow channel material. Non-penetrating recessed parts 3 are formed in a region on the outer peripheral surface of the porous hollow tube 1 which is covered by the laminate body. In order for permeated liquid to flow into the non-penetrating recessed parts 3, the permeated liquid is able to smoothly flow within the non-penetrating recessed parts 3, and the resistance to the permeated liquid can be reduced. Thereby, the pressure loss is reduced, and the permeated liquid amount can be increased. <P>COPYRIGHT: (C)2012,JPO&INPIT |
