Patent ID: 7866487
Filing Date: 2011-01-11
Classification: B01D,C08J,H01M,Y02E,Y10T

Abstract:
1. An aromatic polyamide porous film comprising an aromatic polyamide polymer having repeating units of formula (1) and/or formula (2): wherein Ar wherein X and Y are independently selected from the group consisting of —O—, —CH wherein the aromatic polyamide porous film has an Open Cell structure in which a fibrous material composed of the aromatic polyamide polymer is connected through three- or more forked intersections to form a three-dimensionally spreading network; and where use of an atomic force microscope to measure a range of S μm 2 at least on one surface, the sectional area S (10) μm 2 at a depth of 10 nm from the surface and the sectional area S (20) μm 2 at a depth of 20 nm from the surface results in these measured values satisfying the following formulae simultaneously: