The effect of corn zein coating on the strength and barrier properties of liner paper

Document Type : Research Paper

Authors

1 Associate Professor, Department of Wood and Cellulose products. Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Iran,

2 Graduated from Sari University of Agricultural Sciences and Natural Resources

3 Faculty members

4 agricultural science and natural resources university of sari

Abstract

Zein is one of the important proteins that can be used as a biodegradable coating in packaging cardboards. In this study, the effect of coated zein on the strength and barrier properties of liner cardboard was investigated. Zein was used in three levels of 50, 100, and 150 g/L in ethanol acid (95%) with two softener (glycerol) ratios of 0.5 and 1 (based on the dry weight of the zein) to coat cardboards. The results showed that the increasing of softener concentration in the coating solution had a positive effect on the air resistance and oil absorption but it had negative effect on water absorption. The basis weight, tensile and burst index of the coated samples were enhanced with increasing coating weight while the tear strength decreased. Moreover, the effect of increasing the softener concentration in the coating solution on the basis weight and tear index was positive but negative for tensile and burst indices and the results showed positive effect on the air and oil.

Keywords


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