Tobacco – Smoke separator or treater – Having a polymer
Patent
1987-02-24
1989-09-26
Millin, V.
Tobacco
Smoke separator or treater
Having a polymer
131340, A24D 306
Patent
active
048692751
ABSTRACT:
An ultra-high efficiency cigarette filter is formed from a web of entangled ultra-fine melt blown plastic fibers of extremely low bulk density, the fibers on average having a diameter in the range of 0.1 to 4 microns. The web is formed into a substantially cylindrical rod having a bulk density in the range of 0.029 to 0.046 gram per cc and is encapsulated in and supported by an external plastic tube which adheres to the outer surface of the rod over the entire area of contact therebetween. Cigarette filters in accordance with the invention may have filtration efficiencies in excess of 80%. The disclosure also includes processes and apparatus for manufacturing the high efficiency filters.
REFERENCES:
patent: 3595245 (1971-07-01), Buntin et al.
patent: 3615995 (1971-10-01), Buntin et al.
patent: 4614199 (1986-09-01), Berger
American Filtrona Corporation
Millin V.
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