Study on Correlation Between Coating Rate and Hot Water Soluble Substances of Reconstituted Tobacco

The corresponding relationship between the coating rate and hot water soluble of paper-making reconstituted tobacco was studied in this paper which provided references for the research and application on the off-line detecting of coating rate. Through the accurate quantitative coating experiment, the hot water soluble of reconstituted tobacco by paper-making was determined through soxhlet extraction and coffee machine washing in this paper. And the corresponding relationship between the coating rate and hot water soluble determined by these two methods was also compared in order to make sure which method was more suitable. The results showed that the hot water soluble value was significantly positively correlated with coating rate (P<0.01), if the coating rate distribute between 38% and 46%. The linear equation obtained y=1.007x+1.387, R 2=0.974 and y=0.932x+3.181, R 2=0.985, respectively. The hot water soluble value determined by these two methods were different from each other. And the values determined by soxhlet extraction were mostly lower than the values detected by coffee machine washing; The coating rate derived from hot water soluble values determined by coffee machine washing was more closer to the actual values. It is feasible to derive the coating rate from hot water soluble values, and the method of coffee machine washing is more suitable for practical production testing, which has the advantage of short testing time and simple operation