| 摘要 |
PROBLEM TO BE SOLVED: To provide an immersion type membrane cartridge having an enhanced durability to aeration, and a production method therefore. SOLUTION: The cartridge has an inside fixing part A provided with a resin-made filter plate 41 and a filter membrane 44 arranged so as to cover the surface of the filter plate 41, and in the filter plate 41, an inside fixing part A, a water sealing part S and an outside fixing part B are formed. The inside fixing part A consists of plural margins 42a, 42b and 43 for welding which are projected from the surface of the plate 41, formed multiply along the peripheral part of the plate 41 and weld the filter membrane 44 while the inside margin 42a holds the filter membrane 44 in a stretched state. The water sealing part S is formed of the central margin 42 and secures water stopping function over the whole periphery of the filter membrane 44. The outside fixing part B is formed of the outside margin 43 and fixes the periphery of the filter membrane 44 to the filter plate 41. |
