A novel paper packaging coated with polyethylene wax based dispersion barrier coating for food packaging applications

Food packaging as a protective layer is one of the most important factors that play a key role in providing healthy food. The aim of this study was to provide a novel paper packaging material by coating with a new dispersion barrier coating based on a mixture of soy protein isolate (SPI) and polyethylene wax (PE-wax) emulsion. For this purpose, mechanical properties, water absorption resistance and oxygen permeability of the specimens were investigated. The results indicated that although the tensile strength of coated paperboards decreased with the addition of PE-wax, there was no significant difference between the SPI-coated paperboards and 30% PE-wax coated ones, and 50% PE-wax coated paperboards showed only a decrease of 6% compared to SPI-coated ones. With increasing the share of PE-wax in the coating formulation, oxygen permeability increased in the coated paperboards but water absorption and water vapor permeability decreased dramatically.