异型盒包材料对卷烟含水率的影响

Effects of specially-shaped packet materials on moisture retention for cigarettes

为研究异型盒包材料对烟支含水率的影响,建立了烟丝、卷烟纸、接装纸、硫酸纸、滤棒及盒包材料的等温吸附曲线,并通过DLP模型方程拟合水活度和含水率的相关性,验证拟合结果。根据质量守恒定律并结合DLP方程拟合结果,构建异型盒包体系内各物料含水率预测方法,开展方法的验证试验。结果表明,(1)利用DLP模型方程拟合烟丝及各烟用材料的等温吸附曲线,拟合结果的决定系数均大于0.9990,且含水率实测值与预测值平均相对误差均在5%以内,说明方程具有较高的准确性;(2)相对湿度90%环境条件下,密封度良好的异型烟包在15 d内能较好地隔绝外部环境相对湿度的影响;(3)经不同相对湿度平衡后的盒包装入相同烟支,在18 d后体系内水分可达到充分平衡;(4)根据质量守恒定律并结合DLP方程拟合结果所优化的异型盒包体系内各物料含水率的预测方法具有较高的准确性,不同含水率的异型盒包材料对烟丝、滤棒及硫酸纸造成的影响不同,说明控制异型盒包材料含水率在合理范围内,可以使成品烟支含水率满足质量要求。

In order to investigate the effect of specially-shaped packet materials on the moisture retention for cigarettes,the isothermal adsorption curves of cut tobacco,cigarette paper,tipping paper,sulfate paper,filter rod and packet materials were established post production.The correlation curves between water activity and moisture contents were fitted by the DLP model equation,and the fitting results were verified.According to the law of mass conservation and the fitting results of the DLP equation,a prediction method for the moisture content in each material used in the specially-shaped packet was constructed,and a verification test of the method was conducted.The results showed that:1)The determination coefficients of the fitting results were all higher than 0.9990 by using the DLP model equation,and the average relative errors of the measured and predicted moisture contents were all less than 5%,indicating that the equation was suitable for evaluating the performance of the materials.2)Under the condition of 90%relative humidity,the specially-shaped cigarette packet with a good moisture sealing degree could better isolate the influence of the environmental humidity within 15 days.3)The same cigarettes were packed in the packets balanced at different relative humidity,and the moisture content in the packet system could reach full equilibrium after 18 days.4)The prediction method optimized with the law of conservation of mass and the fitting results of the DLP model equation was accurate for the moisture content in each of the material in the packet system.The packets with different moisture contents in the materials had different effects on cut tobacco,filter rod,and sulfate paper,which indicated that the moisture content in cigarettes could meet the quality requirements by controlling the moisture contents in the materials within a reasonable time range.