| abstract |
Crimped celluclose acetate filter tow having dispersed therein at least one metal oxide selected from zinc oxide, ferric oxide and cuprous oxide, the tow being adapted to be activated by the application thereto of an organic activating agent to alter the characteristics of the individual filaments of the tow to make accessible the oxide dispersed in the two to hydrogen cyanide for removal thereof from the vapor phase of tobacco smoke. Representative of the organic activating agents are triethylene glycol, triacetin, polyethylene glycol, triethylene glycol diacetate, triethyl citrate, propylene glycol, and dimethoxyethyl phthalate. Also disclosed are tobacco smoke filters made from the tow. |