| 摘要 |
PROBLEM TO BE SOLVED: To provide a spiral type separation membrane element which is capable of reducing the pressure loss of a supply side passage and less likely to cause the problem of inhibiting or blocking the flow of the supply side passage. SOLUTION: In this spiral type separation membrane element in which a separation membrane and a supply side passage material and a permeation side passage material are wound around a porous hollow central tube, the supply side passage material is connected with a warp 1 parallel with the flow direction of a supplied liquid and with a weft 2, and the ratio of warp interval L1 to weft interval L2 is 1:1.1 to 1:1.3 and the porosity (e) is 0.80 to 0.90. COPYRIGHT: (C)2006,JPO&NCIPI
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