Study on Two-step Casing for Strips and Cut Strips of Burley Tobacco

To improve casing utilization and casing uniformity,a two-step burley tobacco casing process was adopted,at the first casing step,burley strips were cased after conditioning,heating and loosening;at the second casing step,the cut strips were cased.The preferable casing proportion at each casing step was investigated as well.The results showed that comparing with traditional twice strip casing,the two-step casing raised the casing uniformity coefficient from 53.52% to 90.14% and the effective utilization rate of casing from 61.19% to 88.25% when the ratio of strip casing to cut strip casing was 3∶1.