Philip Morris USA Inc.

Philip Morris Products S.a.

Liqun Yu

Lixin Xue

Kent Brian Koller

Shuzhong Zhuang

John Bryant Paine, Iii

Charles Edwin Thomas, Jr

Georgios D Karles

Jay A Fournier

Timothy Scott Sherwood

Jose Nepomuceno

George Robert Scott

Qiong Gao

Charles Thomas

Tim Sherwood

Joel Schendel

Jose G Nepomuceno

John Bryant Iii Paine

John B Paine Iii

Lixin Luke Xue

Filters and smoking articles include sodium bicarbonate-treated fibers and activated carbon capable of selectively removing one or more selected constituents from mainstream smoke. Methods for making cigarette filters and cigarettes using the sodium bicarbonate-treated fibers and activated carbon, and methods for treating mainstream smoke comprising the sodium bicarbonate-treated fibers and activated carbon are also provided.

Specifically-defined smoking article with activated carbon sorbent and sodium bicarbonate-treated fibers and method of treating mainstream smoke

A smoking article includes a cylinder of smoking material having at least one hollow tube having a heat conductive wall within the cylinder of smoking material and a filter system attached to the cylinder of smoking material. The filter system includes an adsorbent material therein. The at least one hollow tube extends from within the cylinder of smoking material through the adsorbent material. At least one flavorant material is retained within the at least one hollow tube, and upon exposure to heat from the heat conductive wall of the hollow tube the flavorant material releases a flavorant.

Smoking article having flavorant materials retained in hollow heat conductive tubes

Disclosed is a method for forming an article with template shaped channels by (a) mixing a precursor with a fibrous template, (b) forming the mixture into a pre-determined shape, (c) curing the mixture to form a precursor composite, (d) carbonizing the precursor composite, and (e) decomposing the fibrous template to yield a shaped carbon article with template shaped channels.

Templated carbon monolithic tubes with shaped micro-channels and method for making the same

A cigarette filter for removing gas phase constituents from mainstream cigarette smoke as the smoke is drawn through the filter primarily comprises an activated carbon fiber filter section including a bundle of activated carbon fibers. Particulate adsorbent materials such as granules, beads or course powders may be dispersed amongst the activated carbon fibers to aid in removal of the gas phase constituents. Additionally, the activated carbon fiber filter section may be used in combination with a separate bed or beds of particulate adsorbent material. In one embodiment, the activated carbon fibers are positioned within a helical groove on the outside of a threaded rod within the activated carbon fiber filter section. Relatively smaller amounts of activated carbon fibers produce the same smoke constituent reduction as larger amounts of particulate adsorbent material.

Activated carbon fiber cigarette filter

A process of impregnating fine adsorbent particles such as carbon dust or APS silica gel powder into the micro-cavities of shaped fibers comprises the steps of continuously conveying shaped fibers with micro-cavities to a reservoir of the fine adsorbent particles. The fibers pass through the reservoir to thereby produce relative motion between the fibers and the particles. Additionally, impact forces are created between the shaped fibers and the fine particles to assist in impregnating the particles into the micro-cavities of the fibers. Any excess particles are removed from the fibers outside the reservoir, and subsequently the shaped fibers impregnated with fine adsorbent particles are collected for later use in filter applications such as cigarette filter and air filter applications, for example.

Continuous process for impregnating solid adsorbent particles into shaped micro-cavity fibers and fiber filters

Cigarette filters, methods for making cigarettes and methods for smoking cigarettes are provided, which involve the use of an unfunctionalized porous polyaromatic resins, which is capable of removing at least some of at least one gas phase constituent from mainstream smoke through sorption. The unfunctionalized porous polyaromatic resin may be a polymerization product of non-polar styrene and divinyl benzene. Various gas phase constituent can be removed from mainstream tobacco smoke, such as dienes, furans, pyrroles, aromatics and ketones, for example. The cigarette filters and cigarettes can provide low resistance-to-draw and/or high total particulate matter delivery. Additionally, the unfunctionalized porous polyaromatic resin may further include flavorant(s).

Cigarette filters comprising unfunctionalized porous polyaromatic resins for removing gas phase constituents from mainstream tobacco smoke

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Midlothian, VA, United States of America

Liqun Yu