| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semipermeable membrane support having sufficient resistance to alkali solution, with high strength, excellent in manufacturing stability and semipermeable membrane coatability, without strike-through to the surface where semipermeable membrane solution is not coated, and excellent in adhesion properties between a semipermeable membrane and the semipermeable membrane support. <P>SOLUTION: In the semipermeable membrane support provided with the semipermeable membrane at least on one surface of a support, the support contains 30 mass% or more of sheath-core type conjugated fiber with a core component of polypropylene and a sheath component of high density polyethylene, a ratio (A/B) of a melting peak area (A) derived from high density polyethylene on the low melting point side of a DSC curve obtained by differential scanning calorimetry of the sheath-core type conjugated fiber and a melting peak area (B) derived from polypropylene on the high melting point side is 1.00 or more and 2.50 or less, the content of all polyolefin fiber including the sheath-core type conjugated fiber is 90 mass% or more, and air permeability is 1.0-30.0 cc/cm<SP POS="POST">2</SP>/sec. <P>COPYRIGHT: (C)2012,JPO&INPIT |
