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Triethyl citrate (TEC) was applied in the preparation of cigarette filter rods by two approaches. One was to utilize TEC as a plasticizer sprayed onto the surface of cellulose acetate (CA) fibers. The other was to apply TEC as an additive coated onto the cellulosic paper of acetate-paper dual filters. Three types of cigarette filter rods, namely, triethyl citrate-cellulose acetate (TEC-CA) filter rods, triethyl citrate-cellulose acetate-paper (TEC-CA-paper) dual filter rods and cellulose acetate-paper-triethyl citrate (CA-paper-TEC) dual filter rods, were manufactured. In order to promote the curing of CA rods, high-frequency radiation was introduced into the procedure of filter manufacture. Then Virginia type cigarettes, combined with the three kinds of prepared filter rods were manufactured and the removal efficiency of phenols from the cigarette mainstream smoke was investigated. The results revealed that no matter where the triethyl citrate was applied as plasticizer or coating additive, the content of phenol, o-, m-and p-cresol in cigarette mainstream smoke could be greatly reduced. The optimal removal efficiency for phenol was 50% compared with the control. [Beitr. Tabakforsch. Int. 26 (2014) 176-182

Application of Triethyl Citrate to Filters in Virginia Type Cigarettes*