A prediction model for lip sticking force of cigarette tipping paper based on friction coefficient and grammage
To quickly and accurately determine the adhesive force of cigarette tipping paper to lips, a prediction method was proposed based on friction coefficient and grammage. A peel strength tester was used to measure the adhesive force between tipping paper of different brands and artificial mouth skins bonded together by artificial saliva. Through comparison and optimization, the experimental conditions were determined as follows: use of medical silica gel as artificial mouth skin, prepared artificial saliva containing proteins, enzymes and other biologically active and inorganic salts, bonding length of tipping paper and artificial lips 10 mm, bonding area 150 mm2, tensile speed 50 mm/min, artificial saliva volume 6 µL, and standing time 1 min. The lip sticking force of tipping paper strongly correlated to its friction coefficient and grammage, therefore a prediction model for lip sticking force was developed by using the dynamic friction coefficient and grammage. The predicted values basically agreed with the measured values with the coefficient of determination (R2) between predicted and observed values of 0.98 and the normalized root mean square error (nRMSE) of 6.4 %, which indicated that the model was accurate and reliable. This method could quickly, conveniently and quantitatively determine the lip sticking force of tipping paper dispensing with the influence of subjective factors and differential representations of panel sensory evaluation. This study provides a theoretical basis for material testing, quality control and product improvement in the tobacco industry.