Celgard, LLC develops and manufactures microporous polymer separator films for lithium‑ion batteries. Its products focus on dry‑process (stretch) polypropylene and polyethylene membranes in mono‑ and multilayer formats, offered in coated and uncoated grades to deliver ion transport, mechanical durability, and thermal safety features such as shutdown behavior.
Celgard supplies separators for electric vehicles, stationary energy storage, and consumer and industrial battery applications worldwide. The company operates within Polypore International as part of Asahi Kasei’s battery separator business and is headquartered in Charlotte, North Carolina, USA.
