Hemachandra เ. and Euapitaksakul น. (2022) “Heat Sealing of Polypopylene Film in Flexible Packaging”, Journal of Metals, Materials and Minerals. Bangkok, Thailand, 7(2), pp. 53–66. Available at: https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/1459 (Accessed: 18 December 2024).