Evaluation method for impermeability of heated tobacco paper based on contact angle method.

This study preliminarily investigated the evaluation method for the impermeability of heated tobacco paper (abbreviated as heated tobacco paper) based on the static contact angle of the common liquid in heated tobacco (glycerin, water, a mixture of glycerol and water), investigated the influence of air permeability and surface treatment on the impermeability of heated tobacco paper, and explored the feasible method to replace the traditional grease resistance determination of heated cigarette paper. These results showed that with the increase of the air permeability of the heated tobacco paper, the three liquid contact angles showed a decreasing trend which meant the impermeability of heated tobacco paper decreased; the contact angles of different liquid increased with the increase of SK3 coating amount, and the contact angle of glycerol was higher than that of water and glycerol water mixture ( mass ratio =1 : 1), which meant the method of contact angle could distinguish the heated tobacco paper with different impermeability; there was no significant difference between propylene glycol and Kit No. 3, propylene glycol ethanol mixture (mass ratio = 10 : 4) and Kit No. 5 solution in the contact angle results, and it was feasible to quantitatively evaluate the penetration resistance of heated tobacco paper by the contact angle method and replace the traditional grease resistance method with the contact angle of an appropriate test solution by choosing propylene glycol or a specific proportion of propylene glycol ethanol mixture. [ABSTRACT FROM AUTHOR]