Polypore International, LP is a manufacturer of microporous membranes and separator films used primarily in energy storage applications. Part of the Asahi Kasei Group, the company focuses on high-performance materials that enable efficient ion transport and safety in rechargeable battery systems.
Polypore is best known for its Celgard-branded dry-process polyolefin separators for lithium-ion batteries, supplied to producers serving electric vehicles, consumer electronics, and stationary energy storage. The company’s technologies include coated and uncoated multilayer films designed to deliver thermal stability, mechanical strength, and consistent pore structures for high-energy-density cells.
