Ultra-high filtration filter

Details Ultra-high filtration filter Ultra-high filtration filter

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

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