Tobacco filter material and a tobacco filter as produced using t

Details Tobacco filter material and a tobacco filter as produced using t Tobacco filter material and a tobacco filter as produced using t

1997-05-30

1999-07-27

Derrington, James

Tobacco

Smoke separator or treater

Including a cellulose ester or ether

131331, 131332, A24D 306

Patent

active

059272872

ABSTRACT:
A tobacco filter is produced by wrapping up a sheet-like filter material having a web structure and comprising a cellulose ester short staple into a rodform. As the cellulose ester short staple, a short staple that is non-crimped and/or has a modified cross section where a ratio D1/D2 of a diameter D1 of the circumscribed circle to a diameter D2 of the inscribed circle, each circle being of the cross section, of not less than 2 is used. The short staple includes e.g. a cellulose acetate fiber with an average fiber length of 1 to 10 mm and fineness of 1 to 10 deniers. The short staple may be incorporated with a beaten pulp with a Schopper-Riegler freeness of 20 to 90.degree. SR and/or a binder. The ratio of the short staple to the beaten pulp may for example be about 90/10 to 20/80 (by weight).

REFERENCES:
patent: 3426864 (1969-02-01), Pearman
patent: 4283186 (1981-08-01), Keith et al.
patent: 4724849 (1988-02-01), Kawamoto et al.
patent: 5365951 (1994-11-01), Arterbery
patent: 5678577 (1997-10-01), Matsumura et al.
patent: 5690126 (1997-11-01), Matsumura et al.
patent: 5692527 (1997-12-01), Matsumura et al.
patent: 5706833 (1998-01-01), Tsugaya et al.
patent: 5711322 (1998-01-01), Tsugaya et al.
Anon, "Interconversion of Freeness and Wetness Tests, Tappi Data Sheet 20", Technical Association of the Pulp and Paper Industry, Atlanta, GA, 1945.

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