Process of making a porous membrane

Details Process of making a porous membrane Process of making a porous membrane

1988-09-26

1989-10-17

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By treating occluded solids

264126, 264141, 264171, 26421112, 264320, 26433113, 26433117, 264344, B29C 4330, B29C 6704, B29C 6720, B32B 3124

Patent

active

048745685

ABSTRACT:
A method for preparing porous membranes containing a homogeneous microporous structure and narrow pore size distribution which are useful for ultrafiltration, distillation and substrates for composite membranes, including preparing films, pellets or sheets containing alternating microlayers of high density polyethylene and polystyrene, recoextruding these films, pellets or sheets, pulverizing into fine granules or powder, compression molding or sintering into thin films, immersing these films in a solvent bath into which one component is selectively dissolved and separating the resultant porous membrane from the solvent.

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patent: 3839516 (1974-10-01), Williams et al.
patent: 3862030 (1975-01-01), Goldberg
patent: 3884606 (1975-05-01), Schrenk
patent: 3969452 (1976-07-01), Ciliberti et al.
patent: 4164437 (1979-08-01), Henne et al.
patent: 4340479 (1982-07-01), Pall

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