Title: Tobacco smoke filter materials, fibrous cellulose esters, and production processes
Application Number: 95120290 Application Date: 1995.10.20
Publication Number: 1132052 Publication Date: 1996.10.01
Approval Pub. Date: 2003.03.05 Granted Pub. Date: 2003.03.05
International Classifi-cation: A24D3/10
Applicant(s) Name: Daicel Chemical Industries, Ltd. Address:
Inventor(s) Name: Hiroyuki Matsumura;Syu Shimamoto;Tohru Shibata
Attorney & Agent: YANG LIQIN
Abstract:
    A tobacco smoke filter material comprises a fibrillated cellulose ester fiber with an average fiber diameter of 15 to 250 mu m and a BET specific surface area of 0.5 to 4.5 m2/g. The fibrous cellulose ester content of the material may for example be not less than 20 weight %. The cellulose ester fiber is provided by, for example, extruding a cellulose ester solution from a nozzle into a precipitating agent for the particular cellulose ester and subjecting the extrudate to a shear force. This filter material can be used in the form of, for example, a filament, web or sheet to provide a tobacco smoke filter which assures good smoking qualities and excellent wet disintegratability.
Time: 5
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