卷烟纸关键指标对卷烟主流烟气影响机制探究

Investigation on the influence mechanism of key cigarette paper parameters on mainstream smoke

关键词:  卷烟纸关键指标  卷烟主流烟气  炭化区  透气度  纤维长度

Key Words:key parameters of cigarette paper  mainstream smoke delivery  charring zone  porosity  fiber length

摘要:为研究卷烟纸关键指标对卷烟主流烟气释放的影响机理,选取透气度、助燃剂含量和助燃剂类型为卷烟纸关键指标,采用烘烤法模拟卷烟燃烧时的卷烟纸炭化过程,通过探究关键指标对卷烟纸炭化区透气度的影响,并采用纤维质量分析仪对卷烟纸炭化前后的纤维特征进行量化表征,探讨卷烟纸裂解炭化过程中纤维变化情况。结果表明:1)随卷烟纸原纸透气度增大,炭化区卷烟纸透气度呈线性增大趋势,炭化区平均纤维长度由原纸的0.562～0.661 mm下降到0.339～0.375 mm,炭化后卷烟纸透气度增大使卷烟逐口抽吸通风率进一步扩大,从而达到降低烟气释放量的作用。2)随着卷烟纸助燃剂含量升高,炭化区卷烟纸透气度和透气度上升百分比均呈增大趋势,平均纤维长度由原纸的0.601 mm下降到0.333～0.387 mm,助燃剂能催化卷烟纸纤维裂解,使炭化区卷烟纸透气度呈增大趋势,进而达到降低烟气释放量的作用。3)当卷烟纸助燃剂阴离子部分相同时,由于钾原子争夺空气中氧气分子的能力更强,柠檬酸钾及承载柠檬酸钾的纤维骨架更易发生裂解反应,使得添加柠檬酸钾的卷烟纸降低主流烟气的能力强于柠檬酸钠卷烟纸。

Abstract:The key indicators of cigarette paper (porosity,combustion additives content,and combustion additives type) were selected to study their influence mechanisms on mainstream smoke delivery. The baking method was used to simulate the charring of cigarette paper during cigarette burning. The effects of key indicators on porosity in the charring area were investigated. Fiber characteristics before and after charring were quantitatively characterized using a fiber quality analyzer. Fiber changes during the pyrolysis and charring of cigarette paper were systematically examined. Results indicated that:1)With an increase of base cigarette paper’s porosity,the porosity of charring zone exhibited a linear increasing trend. The average fiber length in charring zone decreased from 0.562～0.661 mm to 0.339～0.375 mm. High porosity in charring zone further expanded puff by puff ventilation rate,thereby achieving reduced smoke delivery. 2) An increase of combustion additives content in cigarette paper caused both porosity and porosity increase percentage in charring zone. The average fiber length decreased from 0.601 mm to 0.333～0.387 mm. Combustion additives could catalyze fiber decomposition in cigarette paper,which increased charring zone’s porosity and consequent reduction of smoke delivery. 3)When cigarette papers shared identical anions in combustion additives,potassium-based additives demonstrated superior smoke delivery reduction compared to sodium counterparts. This occurred because potassium atoms exhibited stronger capability to compete for oxygen molecules in air. Potassium citrate and fiber together could decompose more easily than sodium citrate and fiber together. Potassium citrate showed high mainstream smoke delivery reduction capability than sodium citrate.