Patterned porous polymeric product and process

Details Patterned porous polymeric product and process Patterned porous polymeric product and process

1992-04-14

1993-12-21

Spear, Frank

Liquid purification or separation

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Supported, shaped or superimposed formed mediums

21050029, 21050038, 21050041, 21050042, B01D 6114

Patent

active

052718395

ABSTRACT:
Porous polymeric structures are formed from a polymeric sheet by sequential contact of the sheet with a solvent for the sheet and then a non-solvent for the sheet. All or a portion of each non-porous sheet surface is masked to prevent a portion of a surface of the sheet from contacting the solvent. The structure can be porous through all or a portion of its thickness.

REFERENCES:
patent: 3846404 (1974-11-01), Nichols
patent: 4344431 (1982-08-01), Yolles
patent: 4764320 (1988-08-01), Chau et al.
patent: 4775474 (1988-10-01), Chau et al.
patent: 5094876 (1992-03-01), Goldberg et al.
patent: 5137635 (1992-08-01), Seita et al.

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