改善烟草薄片涂布率及其稳定性的研究

Study on the Improvement of Coating Rate and Its Stability of Reconstituted Tobacco

关键词:  烟草薄片  涂布率  涂布液

Key Words:reconstituted tobacco  coating coverage rate  coating liquid

摘要:涂布率及其稳定性是影响烟草薄片品质的重要因素。为优化烟草薄片生产中提升涂布率的工艺，采用单因素实验和正交实验方法，对涂布液温度、涂布液浓度、基片与涂布液的接触时间、涂布辊压力进行了研究。同时，通过改造涂布液供料系统，以提高涂布率的稳定性。结果表明，在实验范围内，随着涂布液浓度、接触时间的增加，涂布率呈现升高趋势；涂布液温度上升，涂布率呈先上升后降低趋势；涂布辊压力增加，涂布率呈降低趋势。烟草薄片涂布工艺中较适宜的工艺参数为：涂布液温度50℃、涂布液浓度48%、接触时间0.20 s、涂布辊压力8 kN/m；通过改进涂料供料系统，涂布率、涂布液浓度、温度等指标的稳定性均有一定的改善，涂布率提高13.1%。

Abstract:The level and stability of the coating coverage rate are important factors affecting the quality of reconstituted tobacco by papermaking method. To determine the optimum technological parameters for coating coverage rate of reconstituted tobacco, the effects of coating liquid temperature, coating liquid concentration, contact time and coating roller pressure were studied by single-factor experiment and orthogonal experiment. Besides, through the modification of coating liquid feeding system, the stability of coating rate was improved. The results showed that in the test range, as the concentration of coating liquid and contact time increased, the coating rate increased. The coating rate increased first and then decreased with the increase of coating liquid temperature. As the pressure of the coating roller increased, the coating rate decreased. The preferable technological parameters were coating liquid temperature of 50℃, coating liquid concentration of 48%, contact time of 0.20 s and coating roller pressure of 8 kN/m. By improving the coating liquid feeding system, the stabilities of coating rate, coating liquid concentration, and temperature were improved. After optimizing the process parameters and improving the coating liquid feeding system, the sensory quality of the reconstituted tobacco was significantly improved, and the coating coverage rate was increased by 13.1%.