JOURNAL OF LIGHT INDUSTRY

CN 41-1437/TS  ISSN 2096-1553

Volume 38 Issue 3
June 2023
Article Contents
LAI Weiyang, FU Lili, ZHANG Ke, et al. Investigation on moisture adsorption properties of fibers and their application in evaluating the coating performance of reconstituted tobacco for heated toboacco products[J]. Journal of Light Industry, 2023, 38(3): 63-72. doi: 10.12187/2023.03.008
Citation: LAI Weiyang, FU Lili, ZHANG Ke, et al. Investigation on moisture adsorption properties of fibers and their application in evaluating the coating performance of reconstituted tobacco for heated toboacco products[J]. Journal of Light Industry, 2023, 38(3): 63-72. doi: 10.12187/2023.03.008 shu

Investigation on moisture adsorption properties of fibers and their application in evaluating the coating performance of reconstituted tobacco for heated toboacco products

  • Received Date: 2023-04-27
    Accepted Date: 2023-05-22
  • To demonstrate the difference in moisture adsorption properties of fibers and the influence on the moisture adsorption properties of the five plant fibers (conifer, broadleaf, flax, grass and bamboo) and one regenerated fiber (Tencel), as well as the adaptability between moisture adsorption properties of fibers and coating performance of reconstituted tobacco for heated tobacco products, were studied. The results showed that the moisture adsorption properties of the six fibers were different. Tencel fiber performed the best, followed by bamboo fiber, and flax fiber performed the worst. The maximum adsorption rate and desorption rate of the fibers increased significantly with the increase of relative humidity during moisture migration. The parallel exponential dynamic model (PEK) was used to fit the moisture migration, it indicated that the progress consisted of a fast and a slow sorption procedure which occurred simultaneously. The fast procedure dominated the water migration behaviour in the sheet. As the relative humidity increased, the equilibrium moisture absorption content of the fast procedure increased and its characteristic time decreased. Meanwhile, the characteristic parameters of the slow procedure had no obvious rule with relative humidity. The micro-structure morphology, environmental conditions and other factors strongly influenced the moisture adsorption properties of fibers, the hygroscopic properties of fibers were positively correlated with the relative humidity (RH), negatively correlated with the crystallization of cellulose, while the temperature showed a weak effect on it. It was found that the reconstituted tobacco sheet showed outstanding coating performance including water and coating liquid with the application of excellent hygroscopic fibers under the condition of adding the same amount ratio during application.
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