Filled porous membrane

摘要

A porous membrane may have a high concentration of spherical fillers with a polymer binder. The polymer binder may have an affinity for the filler materials and may hold the filler materials together in a porous structure with high tortuosity and consistent pore size. The membrane may be manufactured with a reinforcing web, such as non-woven web. The membrane may be greater than 50% porous with a less than 1 micron pore size. Within the pore walls that may be less than 0.02 microns in width, a densely packed filler material may have an average diameter of less than 0.005 microns.

主权项

1. A filled porous non-adsorption membrane comprising:
a polymer binder; one or more filler material(s) comprising at least one spherical filler material; said membrane having:
at least 10% by volume of said at least one spherical filler material by total volume of the porous membrane;a greater than 2:1 pore diameter to particle diameter dimensional ratio; andpore wall thickness greater than the maximum particle dimension of any of the one or more filler material(s).