CIGARETTE FILTER

• Main Authors: WRENN, SUSAN E, HOUCK, WILLIE G., JR, PAINE, JOHN B. III, KOLLER, KENT B
• Format: Patent
• Language: English; French
• Published: 11.05.2000
• Edition: 7
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CIGARETTES; CIGARS; HUMAN NECESSITIES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES; MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING ORCHEWING; MOUTHPIECES FOR CIGARS OR CIGARETTES; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SMOKERS' REQUISITES; SNUFF; THEIR RELEVANT APPARATUS; TOBACCO; TOBACCO SMOKE FILTERS; TRANSPORTING

A cigarette filter having a reagent which chemically reacts with and removes a gaseous component of a smoke stream. The reagent contains functional groups covalently bonded to a non-volatile inorganic substrate which is incorporate d in the filter. The filter can remove gaseous components such as aldehydes fr om tobacco smoke. Preferred functional groups are 3-aminopropylsilyl groups covalently bonded to silica gel (APS silica gel). The reagent can be contain ed in a space in the filter or incorporated in one or more filter elements such as tipping paper, shaped paper insert, mouthpiece plug, solid filter element , or free-flow filter element. The reagent can be part of or coated on paper such as tipping or filter paper or incorporated in non-paper filter elements formed from fibrous materials such as cellulose acetate or polypropylene fibers. Other preferred reagents include aminoethylaminopropylsilyl (AEAPS) silica gel and aminoethylaminoethylaminopropylsilyl (AEAEAPS) silica gel.</S DOAB>