Comparative analysis of paper and cellulose acetate filters in low tar cigarettes
Low tar cigarettes are designed in ways supposed to reduce the amount of harmful compounds from mainstream cigarette smoke. There are many different filter models for achieving this including the use of dual or other combined filters containing charcoal or other filtration materials.
In this study, cellulose acetate (CA) tow and filter paper (FP) were used as filtration media. Indeed, one of the additional advantages of filters containing a paper part is environment friendliness due to faster disintegration in the environment compared with cellulose acetate tow filters.
Monoacetate, monopaper as well as acetate-acetate and acetate-paper filters, both in dual and triple options, were compared while keeping pressure drop and other key physical parameters constant. Cigarettes with the above described filters were made using CM6 tobacco columns with and without ventilation. The smoke was collected on Cambridge filter pads using the ISO smoking regime.
Our research shows that filters combining CA and paper segments have better total particulate matter removal properties from tobacco smoke compared to monoacetate and acetate-acetate filters. However, the paper filter adsorbs more moisture condensate from cigarette smoke than acetate and this could be one of the disadvantages for paper filter due to supposed dry smoke taste.
We believe that a filter combining paper and acetate tow parts have a relatively good potential for achieving low tar and environmentally friendly cigarettes with balanced taste properties.