Effect of Tobacco Powder Particle Size and Its Distribution on Properties of Slurry-type Reconstituted Tobacco Leaf
Five groups of cigarette powder with different particle sizes were used to prepare slurry-type reconstituted tobacco leaf(RTL).The impact characteristics cigarette powder with single mesh size and continuously graded mixed cigarette powder on the prop-erties of slurry and RTL were revealed,the effects of particle size distribution on RTL properties were analyzed,to find out optimal par-ticle size and grading scheme of cigarette powder.The results showed that,as the particle size of tobacco powder decreased,the viscos-ity of the slurry decreased,and the density and tensile strength of RTL increased.Using small particle size tobacco powder could pre-pare RTL with better strength but excessively high density.Mixed four particle sizes of tobacco powder from 80 mesh to ≥200 mesh with a grading coefficient of 0.2,the tensile strength and thickness of RTL were suitable.Comparing tobacco powder with the same av-erage particle size but different size distribution,a wider particle size distribution was more conducive to the strength property of RTL.Taking into account the properties of slurry and RTL,the optimal mixing conditions for tobacco powder were as follows:the proportion of four particle sizes of tobacco powder from 80 to ≥200 mesh was 32.2％,13.0％,12.8％,and 42.0％,respectively,the density was 0.72 g/cm3,and the tensile strength was 0.549 kN/m.
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