| 摘要 |
A task of the invention is to provide a semipermeable membrane supporting body which has excellent smoothness on a semipermeable membrane coating surface and can not be permeated by the semipermeable membrane solution. The semipermeable membrane supporting body is characterized in that the semipermeable membrane supporting body is composed of non-woven fabric which comprises more than two main synthetic fiber and adhesive synthetic fiber with different fiber diameters and is provided with the semipermeable membrane coating surface and a semipermeable membrane non-coating surface. In a thickness direction when observed from a cross section SEM of the non-woven fabric, a cross section aspect ratio (long diameter/short diameter of the cross section of the fiber) of the main synthetic fiber in a range between a surface and 1/3 part of the semipermeable membrane coating surface and/or a cross section aspect ratio (long diameter/short diameter of the cross section of the fiber) of the main synthetic fiber in a range between a surface and 1/3 part of the semipermeable membrane non-coating surface are 1.2-3.0. |
