Method for the manufacture of an electret fibrous filter

Details Method for the manufacture of an electret fibrous filter Method for the manufacture of an electret fibrous filter

1983-08-01

1986-06-03

Thurlow, Jeffery

Gas separation

Means within gas stream for conducting concentrate to collector

55528, 12820529, 210508, 264 22, 264 27, 264DIG47, 307400, 361226, 361233, D01D 542

Patent

active

RE0321710

ABSTRACT:
A method for the manufacture of an electrically charged fibrous filter from a highly molecular non-polar fiber material wherein a [web] film of the fiber material is continuously fed and stretched. At least one side of the stretched [web] film is homopolarly charged by a plurality of corona charging elements. The charged [web] film material is then fibrillated, collected and processed into a filter.

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patent: 3691264 (1972-09-01), Asahina
patent: 3880966 (1975-04-01), Zimmerman et al.
patent: 4069026 (1978-01-01), Simm et al.

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