| Abstract:Influence of the gap between the beater roll and bed plate of PFI mill, beating time and consistency of tobacco pulp on bulk of uncoated reconstituted tobacco sheet produced by papermaking process was researched using PFI mill as the beating equipment. Meanwhile through the comparison of fiber morphologies under different beating process parameters, the reason for the influence of beating process on bulk of uncoated reconstituted tobacco sheet produced by papermaking process was also researched. The results showed that in the beating of tobacco pulp, fiber number decreased, mean fiber length increased, fiber coarseness increased, bulk of paper base made with wood pulp and PCC was improved with decreasing beating time, increasing beating interstice and pulp consistency. Within the ranges of beating parameters studied, compared with consistency of pulp, beating time and beating interstice had greater effect on fiber morphology and bulk of paper base. Because of the characteristics of tobacco pulp, different beating process parameters had little effect on fibrillation of fiber. The optimized beating process parameters with PFI mill was: beating time 10000～15000 round, beating interstice 0～0.5 mm and pulp consistency 10.0%～11.7%． |
