烟丝长度及其混料配比对细支卷烟质量特性的影响

Effects of cut tobacco’s length and its proportions in tobacco blend on quality of slim cigarettes

为探索适宜细支卷烟的烟丝结构,分析了烟丝宽度、长度及不同长度烟丝混料配比与细支卷烟的烟支密度、物理指标和主流烟气指标的关系,结果表明:①烟支压实段(烟支端头第5~9 mm区间)密度、烟支密度压实比(压实段与17~52 mm区间填充段的密度比)均与烟丝长度呈负相关,而烟支密度标准偏差与烟丝长度正相关;烟支吸阻、硬度、滤嘴通风率、含末率、端部落丝量等指标与烟丝长度负相关;总粒相物、焦油量、水分、CO量与烟丝长度极显著正相关。②烟丝宽度0.85 mm时,细支卷烟的烟支密度、物理指标和主流烟气指标呈现良好的可调控性,且水分高而稳定,有利于抽吸品质中润感的保持;长度>6.80 mm的烟丝混料配比为4.0%时,烟支压实比高,硬度、吸阻低,滤嘴通风率高,且指标稳定性好,主流烟气的焦油量和CO量均相对较低,烟碱量适中。③烟丝长度直接影响烟支轴向密度,进而通过烟支密度间接影响细支卷烟的物理指标和主流烟气指标。④通过对长度>6.80 mm和≤2.29 mm烟丝的混料配比控制以及梗片的丝状处理,碎丝率增加约0.4百分点,卷烟机剔除率降低约1.0个百分点,吸阻稳定性提升,硬度略有增加,细支卷烟机生产效率有所提升。

In order to find out the suitable cut tobacco structure for making slim cigarettes, the relationships of cut tobacco’s width, its length and proportion in tobacco blend with the density, physical indexes and mainstream smoke analytes of slim cigarettes were analyzed. The results showed that: 1) The density of dense segment(5-9 mm longitudinally from tobacco end)of tobacco rod and compression ratio, the density ratio between the dense segment and normal segment(17-52 mm longitudinally from tobacco end), negatively correlated to cut tobacco length, and the standard deviation of rod density positively correlated to cut tobacco length. Cut tobacco length negatively correlated with the draw resistance, hardness, filter ventilation rate, dust content and loss of tobacco from the ends of cigarette, and extremely positively correlated to TPM, tar, CO and moisture contents. 2)In the case of 0.85 mm cut tobacco width, the density, physical indexes and mainstream smoke analytes of slim cigarette presented good controllability, the moisture content was high and stable, which is beneficial to moisture retention. When the proportion of cut tobacco longer than 6.80 mm was 4.0%, slim cigarette featured higher compression ratio, lower hardness and draw resistance, higher filter ventilation rate, stable indexes, relatively lower tar and CO and moderate nicotine contents in mainstream smoke. 3)Cut tobacco length directly influenced the axial density of tobacco rod,and then indirectly affected the physical indexes and mainstream smoke analytes of slim cigarette accordingly.4)Through the control of proportions of cut tobacco longer than 6.80 mm and shorter than 2.29 mm, as well as fibrous processing of tobacco stem, broken strand increased by about 0.4 percentage point, cigarette rejection rate decreased by about 1 percentage point, the consistency of draw resistance promoted, hardness rose slightly, and the efficiency of slim cigarette maker improved to a certain extent.