Celgard is one of the leading designers, manufacturers and marketers of battery separators in the world. The company has operations in North America, Europe and Asia. Celgard provides olyethylene electrolytic membranes that are used in notebook computers, cellular telephones and digital cameras. The company s products are also used in photographic equipment, games, music players, toys, cordless power tools and medical devices. Operational for more than 30 years, Celgard is a wholly owned subsidiary of Polypore International. The company offers nickel-cadmium aircraft and hearing aid batteries. Celgard additionally has several manufacturing facilities in North Carolina. Its affiliated companies include Daramic and Liqui-Cel.