Microporous polyethylene hollow fibers

Details Microporous polyethylene hollow fibers Microporous polyethylene hollow fibers

1981-07-07

1983-08-30

Kendell, Lorraine T.

Liquid purification or separation

Filter

Material

428376, 428398, 2642091, B01D 3900, D02G 300

Patent

active

044015674

ABSTRACT:
Porous hollow fibers composed of a high density polyethylene the fibers having rectangular micropores that are oriented in the lengthwise direction of the fibers and having a porosity from 30 to 90% by volume are disclosed. Membranes composed of hollow fibers exhibit a water permeability of greater than 65 (ml/m.sup.2, hr, mmHg) as well as a human serum albumin permeability of greater than 30%. Such fibers are suited for use as filters, particularly as a membrane for simple fractionation of whole blood into its plasma and cellular components. The hollow fibers are obtained by spinning a high-density polyethylene under a high-draft condition followed by cold stretching and hot stretching, and without the use of any solvent or plasticizer.

REFERENCES:
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patent: 3839240 (1974-10-01), Zimmerman
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patent: 4001367 (1977-01-01), Guthrie
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patent: 4055696 (1977-10-01), Kamada et al.
patent: 4055702 (1977-10-01), Guthrie et al.
patent: 4182582 (1980-01-01), Youval
Williams et al, A Study of the Sorption and Permeability of Gases and Vapors in Solvent-Drawn Polyethylene, Die Makromolekular Chemie 135, 41-47, (1970).

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