Vapour temperature in polylactic acid (PLA) free heat-not-burn products
For the purpose of tobacco harm reduction, new generations of heated tobacco (heat-not-burn - HnB) products (HTPs) were introduced in the market (Savareear et al., 2018). Most existing HnB products are using polylactic acid (PLA) films or fibers to reduce vapour temperature. In this study we investigate different filter designs to lower vapour temperature without using PLA. Although PLA is made from natural renewable sources, its degradation rate is very slow in ambient temperatures showing no significant advantages against conventional plastics (Bagheri et al., 2017).
Various combinations of acetate filters, outer shape filters, acetate and paper tubes were combined to reach full flavour delivery and low vapour temperature. For the tobacco column we used commercially available tobacco segments of HnB sticks. Regular HnB sticks were used as standards with which we compared our design filters. Vapour temperature was measured puff-by-puff and vapour condensate was collected on Cambridge filters. Vapour phase condensate was collected, extracted and analysed on Agilent 5977 Intuvo GCMS.
Some HnB combinations showed temperatures comparable to commercially available products containing crimped PLA films. We believe that HnB cigarettes containing paper and acetate tow parts have a good potential to achieve low vapour temperatures and tor become an environmentally friendly product with balanced taste properties.