Vinylidene fluoride porous membrane and method of preparing the

Details Vinylidene fluoride porous membrane and method of preparing the Vinylidene fluoride porous membrane and method of preparing the

1994-10-05

1996-05-07

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

428131, 428134, 428212, 428220, 4283044, 4283142, 4283155, 428421, 21050042, 21050023, 521145, B01D 1300

Patent

active

055144616

ABSTRACT:
A polyvinylidene fluoride porous membrane has an asymmetrical structure, excellent mechanical strength such as tensile strength at break and elongation at break, and a desirable narrow range of pore diameter distribution. A method of preparing the porous membrane is also disclosed. The membrane comprises a vinylidene fluoride resin having an inherent viscosity from 1.3 to 15.0 (dl/g), and the membrane comprises pores which satisfy the following numerical expression (A):

REFERENCES:
patent: 4238571 (1980-12-01), Mano et al.
patent: 4629563 (1986-12-01), Wrasidlo
patent: 4869857 (1989-09-01), Itoh et al.
patent: 5022990 (1991-06-01), Doi et al.
patent: 5221479 (1993-06-01), Etoh et al.
patent: 5387378 (1995-02-01), Pintauro et al.

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