Polypore International, LP develops, manufactures, and markets specialized microporous membranes for use in separation and filtration processes. The company operates in three segments: energy storage (electronics and EDVs), energy storage (transportation and industrial), and separation media. The company provides a range of patented polypropylene and polyethylene monolayer and multilayer membrane separators for lithium batteries that are used in various applications, such as consumer electronics devices, electric drive vehicles (EDVs), cordless power tools, and energy storage systems. It also offers polymer-based membrane separators for lead-acid batteries for automobiles and other motor vehicles and filtration membranes and modules that are used in healthcare applications comprising hemodialysis, blood oxygenation, plasmapheresis, and other medical applications, as well as various filtration and specialty applications such as microfiltration, ultrafiltration, and gasification/degasification applications. The company sells its products to manufacturers and converters through its direct sales force, distributors, and agents. It operates primarily in the United States, Germany, France, China, and other countries. The company was incorporated in 2004 and is based in Charlotte, North Carolina. As of August 26, 2015, Polypore International, LP operates as a subsidiary of Asahi Kasei Corporation.