Self supporting hollow fiber membrane and method of construction

Details Self supporting hollow fiber membrane and method of construction Self supporting hollow fiber membrane and method of construction

1996-02-06

2000-06-13

Copenheaver, Blaine

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

21050023, 21050035, 21050042, 428373, 428398, B32B 108, B01D 3900

Patent

active

060747188

ABSTRACT:
A method for constructing a polyvinylidene fluoride based hollow fiber membrane from a polymer mixture using temperatures not greater than 80.degree. C., the mixture comprising polyvinylidene fluoride, a pore forming agent, and a solvent. The mixture can also comprise a second polymer selected from the group comprising polymethylmethacrylate, polyvinylformal, polyvinyl alcohol, polyhexafluoropropylene, polydiacetylene, cellulose and copolymers thereof. The hollow fiber membranes formed using the controlled temperatures of this invention have acceptable strength characteristics and asymmetrical pore structures which provide a low transmembrane pressure drop.

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