Electret filter media

Details Electret filter media Electret filter media

B - Operations, Transporting

01

D

B01D 39/04 (2006.01) A62B 23/00 (2006.01) D04H 1/54 (2006.01)

Patent

CA 2474282

A method of charging a nonwoven web of thermoplastic microfibers to provide electret filter media is provided. The method includes impinging on a nonwoven web of thermoplastic nonconductive microfibers capable of having a high quantity of trapped charge jets of water or a stream of water droplets at a pressure sufficient to provide the web with filtration enhancing electret charge and drying said web.

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