梗叶配比对加热卷烟专用稠浆法再造烟叶品质的影响

  目的  研究不同梗叶配比对加热卷烟专用稠浆法再造烟叶品质的影响，为稠浆法再造烟叶的开发提供支撑。  方法  分别制备了全叶及梗叶配比为1:9、2:8、3:7、4:6、5:5的稠浆法再造烟叶，测定并对比分析了抗张强度、定量、松厚度、热失重及感官质量。  结果  （1）随着烟梗添加比例的增加，稠浆法再造烟叶的定量、抗张强度降低，但松厚度增加。（2）加热卷烟专用稠浆法再造烟叶的热失重可分为3个阶段。全叶制备的稠浆法再造烟叶在第Ⅰ阶段失重比例、最大失重速率较低，但在第Ⅱ、Ⅲ阶段失重比例和最大失重率较高。掺配烟梗后，稠浆法再造烟叶在第Ⅰ阶段的失重比例、最大失重速率较全叶制备的稠浆法再造烟叶明显提升；随着烟梗添加比例的提升，稠浆法再造烟叶在第Ⅱ阶段的失重比例逐渐降低，但在第Ⅲ阶段的失重比例逐渐增加；三个阶段的最大失重速率排序为:第Ⅱ失重阶段>第Ⅲ失重阶段>第Ⅰ失重阶段。（3）随着烟梗占比增加，再造烟叶热流曲线的第一个放热峰的峰值逐渐降低。梗叶配比2:8、梗叶配比3:7的稠浆法再造烟叶的DSC放热峰信号响应值较高。（4）稠浆法再造烟叶中梗叶配比例为2:8时，其感官评吸总分最高，综合感官品质较好。  结论  适宜的梗叶配比不仅可降低稠浆法再造烟叶的成本，而且可提高其松厚度，还可提升、改善其综合感官品质。 

Effects of stem-leaf ratio on quality of slurry processed reconstituted tobacco for heated tobacco products

  Objective  In this paper, the effect of different stem-leaf ratio on the quality of slurry processed reconstituted tobacco for HTP cigarettes was studied, which can provide theoretical basis for the development of the slurry processed reconstituted tobacco.  Methods  Different reconstituted tobacco samples, with various stem-leaf ratio of 0:10, 1:9, 2:8, 3:7, 4:6 and 5:5, were prepared as research objects. The tensile strength, quantitative and loose thickness, thermal weight loss and sensory quality of the prepared samples were detected and compared.  Results  The results show that: (1) With the increase of the proportion of tobacco stem, the quantitative and tensile strength of reconstituted tobacco decreased, but the bulk increased. (2) The total weight loss ratio of reconstituted tobacco can be divided into three stages. For the sample prepared by tobacco leaf (no stem), the ratio of weight loss and the maximum weight loss rate were lower in the first stage, but higher in the second and third stages. After adding tobacco stem, the weight loss ratio and maximum weight loss rate of slurry processed reconstituted tobacco in the first stage were significantly higher than that of the reconstituted tobacco prepared by tobacco leaf (no stem). Furthermore, with the increase of the addition ratio of tobacco stem, the weight loss ratio of the reconstituted tobacco in the second stage was gradually decreased, but the weight loss ratio of the reconstituted tobacco in the third stage was gradually increased. The maximum weight loss rate in the three stages can be ranked as: the second weight loss stage> the third weight loss stage> the first weight loss stage. (3) As the proportion of tobacco stem increased, the peak value of the first heat flow exothermic peak of reconstituted tobacco leaf gradually decreased. Furthermore, the heat flow curve of the samples with 2:8 and 3:7 stem-leaf ratio showed higher signal response value than other samples. (4) When the stem-leaf ratio was 2:8, the total score of sensory evaluation was the highest, and the comprehensive sensory quality was better than other samples.  Conclusion  The suitable stem-leaf ratio can not only reduce the cost of slurry processed reconstituted tobacco, but also increase its bulk and enhance its comprehensive sensory quality.