| 摘要 |
PROBLEM TO BE SOLVED: To design a membrane that gives a macromolecular porous membrane as a diaphragm that can give a closed space for fine particles (prion, virus, bacteria, etc.) and an opened space for molecules, and removes fine particles in liquid, recovers dissolved molecules at a high rate of recovery and whose filtration capacity is big, and to provide a method for manufacturing the same. SOLUTION: A raw materials of flat membrane of which include a cellulosic and its saponified, regenerated cellulosic multilayer membrane, and which is a laminate of 100 layers or more with an average pore size of 5 to 500 nm, has a film thickness of 40 to 500μm, and a porosity of 0.7 or more, and a thickness of one layer thereof of 0.05 to 0.5μm is designed, and also configured such that the ratio of the amounts of particles captured by filtration on the front face to the back face of the flat membrane is 1/5 to 1/100, the particles having an average pore size being two times the pore size of the membrane. The method for manufacturing the flat membrane includes producing the membrane by a dry-type micro-phase separation method and casting a coasting solution in a form of a solid flat plate with micro irregularities. COPYRIGHT: (C)2010,JPO&INPIT |
