再造烟叶物理特性对加热卷烟烟丝及卷烟特性的影响研究
Effects of physical properties of reconstituted tobacco sheets on cut filler and cigarette characteristics for heated tobacco products
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摘要: 【目的】探究不同加工工艺再造烟叶的物理特性,并考查其与加热卷烟烟丝、卷烟特性间的内在关联。【方法】采用气相色谱、扫描电子显微镜表征稠浆法、辊压法和干法3种加工工艺再造烟叶的成分与微观结构,利用质构仪测定其弹性模量、断裂强度、表面黏附力等物理特性,结合灰色关联度与多元线性回归方法分析再造烟叶各物理特性与烟丝特性(整丝率、碎丝率、填充值)、卷烟特性(质量、圆周、吸阻、硬度)的关联性及影响权重。【结果】3种加工工艺再造烟叶的成分、微观结构及物理特性均存在显著差异;干法再造烟叶结构蓬松多孔、纤维含量高、液态成分最低,质构强韧;辊压法再造烟叶结构致密、液态成分最高,断裂伸长率高且不易断裂;稠浆法再造烟叶结构与成分居中,强度高但断裂伸长率低、易断裂。再造烟叶烟丝整丝率主要与物理特性中纵向拉伸断裂强度、横向剪切强度正相关,影响权重约为13.228%、11.338%;填充值主要与纵向弹性模量、纵向拉伸断裂伸长率正相关,影响权重约为21.624%、12.231%;卷烟特性主要与烟丝填充值和整丝率关联性较高。【结论】再造烟叶的纵向弹性模量、纵向拉伸断裂强度/伸长率等关键物理特性通过影响烟丝的填充值和整丝率,进而影响卷烟的吸阻、质量、圆周等。Abstract: 【Objective】To investigate the physical properties of reconstituted tobacco sheets produced by different processes and to examine their relationships with the cut filler characteristics and cigarette properties of heated tobacco products.【Methods】Gas chromatography and scanning electron microscopy were used to characterize the chemical composition and microstructure of reconstituted tobacco sheets produced by three processes, namely the slurry, rolling, and dry method. A texture analyzer was employed to measure their physical properties, including elastic modulus, fracture strength, and surface adhesion. Grey relational analysis and multiple linear regression were then applied to evaluate the correlations and influence weights between these physical properties and cut filler characteristics (long strand proportion, broken strand proportion, filling value) as well as cigarette physical properties (weight, circumference, draw resistance, hardness).【Results】Significant differences were observed in the chemical composition, microstructure, and physical properties among the reconstituted tobacco sheets produced by the three processes. The dry-method sheets exhibited a loose and porous structure, high fiber content, and the lowest amount of liquid components, resulting in a tough texture. The rolling-method sheets displayed a dense structure, the highest liquid content, high elongation at break, and strong resistance to fracture. The slurry-method sheets showed moderate composition and structure, with high strength but low elongation at break, making them prone to fracture. Correlation and regression analyses revealed that the long strand proportion was positively correlated with the longitudinal tensile fracture strength and transverse shear strength, with influence weights of approximately 13.228% and 11.338%, respectively. The filling value was positively correlated with the longitudinal elastic modulus and longitudinal elongation at break, with influence weights of about 21.624% and 12.231%. Cigarette properties were predominantly associated with the filling value and long strand proportion.【Conclusion】Key physical properties of reconstituted tobacco sheets, such as longitudinal elastic modulus, longitudinal tensile strength at break, and elongation, influence the filling value and long strand proportion of the cut filler, which in turn affect cigarette physical properties including draw resistance, weight, and circumference. These findings provide a theoretical reference for the subsequent process optimization, texture control, and blending design of reconstituted tobacco sheets for heated tobacco products.
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