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

1978-07-31

1981-10-27

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264DIG47, 264DIG48, B29D 2700

Patent

active

RE0307823

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.

REFERENCES:
patent: 3003304 (1961-10-01), Rasmussen
patent: 3333032 (1967-07-01), Dickinson
patent: 3336174 (1967-08-01), Dyer et al.
patent: 3438504 (1969-04-01), Furman
patent: 3474611 (1969-10-01), Suzuki et al.
patent: 3571679 (1971-03-01), Turnhout
patent: 3644605 (1972-02-01), Sessler et al.
patent: 3691264 (1972-09-01), Asahina
patent: 3880966 (1975-04-01), Zimmerman

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