Polypore International, Inc. is a global high technology filtration company that develops, manufactures and markets specialized microporous membranes used in separation and filtration processes. The microporous membranes the Company produces are highly engineered polymeric structures that contain millions of pores per square inch, enabling the management of ions, gases and particles that range in size from the cellular to the nano or molecular level. The energy storage business produces and markets membranes that provide the critical function of separating the cathode and anode in a variety of battery markets. The separations media business produces and markets membranes and membrane modules used in hemodialysis, blood oxygenation, plasmapheresis and various high-performance microfiltration, ultrafiltration and gasification/degasification applications.