| 摘要 |
<p>A method for production of a micro-porous membrane comprising the steps of: mixing a quantity of finely divided particulate material into a fluid, membrane-forming polymer material; said particulate material being insoluble in said polymer material; forming the particle-containing fluid polymer material into a thin layer and aligning the particles in said layer substantially normal to the surface of said layer while said polymer material is in the fluid state; solidifying said layer containing the aligned particles to form an aligned particle containing membrane; and extracting particles from the aligned particle containing membrane without destroying the membrane to produce a microporous membrane having aligned pores substantially normal to the surface of the membrane. These membranes find use in ultrafiltration, dialysis, and reverse osmosis procedures. Such membranes do not suffer from the manufacturing difficulties encountered with known membranes, such as control of pore size.</p> |
