Abstract: A mathematical model is established by tobacco making thread process parameters to the emission of phenol in mainstream smoke. The principal-factor effect, single-factor effect, marginal effect and double-factor effect of the model are analyzed. The results show that, the contribution order for the phenol emission is the tobacco cut width>the hot air damper opening>the temperature of cylinder wall>the HT operating steam pressure>the hot-air temperature>the revolving speed of casing cylinder. There should be a negative correlation between the phenol emission exhibit and the HT operating steam pressure, the tobacco cut width, whereas the phenol emission exhibited a positive correlation with the other factors. Strong interactive influence existed between the hot-air temperature and the temperature of cylinder wall, the temperature of cylinder wall and the revolving speed of casing cylinder. Increasing the tobacco cut width, improving HT operating steam pressure, or reducing the other factors on the control of the emission of phenol in mainstream cigarette smoke have a positive effect.

Key words: phenol, tobacco making thread processs, uniform design, effect analysis