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Celgard is a recognized global leader in developing, manufacturing and marketing battery separators that are used in high performance lithium battery markets.
 http://www.celgard.com
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Daramic is the world's leading manufacturer and supplier of battery separators for automotive, industrial, and specialty applications. Established over seventy-five years ago, the company services the global battery manufacturing industry through marketing and sales offices in North and South America, Europe, South East Asia and China, supported by seven strategically located manufacturing facilities and two industry-dedicate Technical Centers.
http://www.daramic.com
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Membrana is a world leader in microporous membranes for medical applications like dialysis, oxygenation, and plasma separation. Membrana is also a major supplier of membrane products to the semiconductor, power, pharmaceutical, food and beverage, and photographic markets.
http://www.membrana.com
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