| 摘要 |
A filter element suitable for use as a cigarette filter includes at least one section of fibrous tow comprising at least one plasticizer, the plasticizer including a citric acid ester, such as triethyl citrate, present in an amount of no more than about 15 weight percent based on the total weight of the filter material, and an adsorbent material, such as a granular carbonaceous material. One exemplary filter element has two or more sections of cellulose acetate tow comprising triethyl citrate in an amount of no more than about 12 weight percent based on the total weight of the filter material, and a granular carbonaceous material dispersed within at least one section of cellulose acetate tow. Cigarettes incorporating the filter element and methods of extending shelf-life of cigarettes including an adsorbent material are also provided. |
