Cigarette filters

Details Cigarette filters Cigarette filters

1987-11-16

1989-04-18

Millin, V.

Tobacco

Smoke separator or treater

Including a cellulose ester or ether

131343, 131340, A24D 304

Patent

active

048217506

ABSTRACT:
Skinless shaped articles having increased specific surface area and based on cellulose esters, including both solid and hollow fibers, can be produced with at least one surface having a striated or fibrous appearance and a cellular interior structure by extruding a spinning solution comprising a cellulose ester and a solvent therefor directly into an aqueous bath, wherein the residual content of solvent in the bath is maintained at a concentration below a critical level, preferably less than about 10 weight percent.

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