C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/19
C08J 9/26 (2006.01)
Patent
CA 1107922
ABSTRACT OF THE DISCLOSURE 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 sub- stantially 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 contain- ing membrane without destroying the membrane to produce a micro- porous membrane having aligned pores substantially normal to the surface of the membrane. These membranes find use in ultra- filtration, dialysis, and reverse osmosis procedures. Such membranes do not suffer from the manufacturing difficulties en- countered with known membranes, such as control of pore size.
306310
Fetherstonhaugh & Co.
Kilcher-Chemie Ag
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