Jongjun, Y., Pornprasert, P. and Prateepchanachai, S. 2024. Improvement of heat-sealing strength of chitosan-based composite films and product costs analysis in the production process. Journal of Applied Research on Science and Technology (JARST). 23, 1 (Feb. 2024), 251817. DOI:https://doi.org/10.60101/jarst.2023.251817.