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.