烟片皱缩率测定方法的建立及差异性分析

目的]准确测定烟片的烤后皱缩率,评价不同烟叶原料的皱缩特性.方法]建立一种基于干燥前后面积变化率的烟片皱缩率测定方法,通过正交试验对烟片尺寸、形状和干燥温度等测定条件进行优化,利用所建立的方法测定33种初烤后烟叶的皱缩率并进行差异性研究.结果](1)烟片干燥后既会产生皱缩、也会发生弯曲,利用网孔盖板可有效控制弯曲...

Establishment and variability of a method for determining the shrinkage rate of tobacco flakes

  Objective  This study aims to accurately determine the post-drying shrinkage rate of tobacco flakes and to evaluate the shrinking characteristics of different tobacco raw materials.  Methods  A method was developed to determine the shrinkage rate of tobacco flakes based on the change rate of area before and after drying, and the measurement conditions such as flake size, shape and drying temperature were optimized by orthogonal tests.  Results  (1) Shrinking and bending may occur after drying, and the use of a mesh cover can effectively control the bending phenomenon and improve the accuracy and repeatability of the measurement of shrinkage rate. (2) The results of the orthogonal test showed that the size of the tobacco flakes and the drying temperature had a significant effect on the shrinkage rate, while the shape of the tobacco flakes did not have a significant effect; the largest shrinkage rate of the tobacco flakes was found using round flakes with a diameter of 30 mm under the drying temperature of 80℃. (3) There was significant difference in the shrinkage rate at different parts of the tobacco leaves, with the ranking of upper leaf> middle leaf > lower leaf.  Conclusion  Shrinkage is an inherent characteristic of tobacco leaves. The established method for determining the shrinkage rate is scientific and feasible, which can quantitatively evaluate the shrinking characteristics of tobacco leaves.