Polymeric membranes

Details Polymeric membranes Polymeric membranes

1990-08-30

1992-02-04

Sever, Frank

Liquid purification or separation

Filter

Material

55158, 21050039, E01D 7158

Patent

active

050857746

ABSTRACT:
Improved polymeric membranes and their method of manufacture are disclosed. The improved membranes are produced by increasing the draw ratio employed during the manufacture of the membrane. The membranes show at least substantially constant or increased selectivity and mechanical properties as the draw ratio is increased.

REFERENCES:
patent: 3851025 (1974-11-01), Ram
patent: 4460526 (1984-07-01), Makino et al.
patent: 4741829 (1988-05-01), Takemura et al.
patent: 4863496 (1989-09-01), Ekiner et al.
patent: 4885092 (1989-12-01), Zwick
J. P. Espenan, "Outer Skinned Hollow-Fibers-Spinning and Properties", Proc. of the Europe-Japan Congress on Membranes and Membrane Processes, 1984, pp. 151-161.
G. C. East et al., "Production of Porous Hollow Polysulphone Fibres for Gas Separation", Fourth BOC Priestly Conference, Royal Society of Chemistry, London (Special Publication No. 62), 1986, pp. 130-157.
P. Aplel et al., "Polysulfone Hollow Fibers Effect of Spinning Conditions on Ultrafiltration Properties", Journal of Membrane Science 22 (1985), pp. 199-215.

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