Method and apparatus for making a fibrous electret web using...

Details Method and apparatus for making a fibrous electret web using... Method and apparatus for making a fibrous electret web using...

B - Operations, Transporting

01

D

B01D 39/08 (2006.01) A62B 23/02 (2006.01) B01D 39/16 (2006.01) B03C 3/28 (2006.01) D01F 1/10 (2006.01) D06M 13/352 (2006.01) D06M 23/10 (2006.01)

Patent

CA 2385770

A method for imparting an electrostatic charge to a nonwoven fibrous web (20). The fibrous web (20) is wetted with a wetting liquid (24), followed by being saturated with an aqueous polar liquid (30) and drying (31). The resulting dried product is an electret article (43) that could be used as an air filter in, for example, a respirator (50).

Cette invention a trait un procédé permettant de conférer une charge électrostatique à une bande fibreuse non tissée (20). On mouille cette bande fibreuse (20) avec un liquide mouillant (24), puis on la sature avec un liquide polaire aqueux (30) et on la sèche (32). Le produit sec résultant est un article du type électret (43) pouvant être notamment utilisé comme filtre à air pour respirateur.

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