Effect of polyethylene wax/soy protein-based dispersion barrier coating on the physical, mechanical, and barrier charact
- PDF / 1,022,822 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 23 Downloads / 148 Views
Effect of polyethylene wax/soy protein-based dispersion barrier coating on the physical, mechanical, and barrier characteristics of paperboards Pouya Marzbani, Mohammad Azadfallah , Maryam Yousefzadeh, Farhood Najafi, Ahmad Ali Pourbabaee, Hanna Koivula, Mikko Ritala
American Coatings Association 2020 Abstract Application of barrier dispersion coatings on paperboards, which must have proper moisture and grease resistance for food applications, has always been an interesting subject for the packaging industry. In this study, paperboards were coated with a novel dispersion barrier coating prepared through mixing soy protein isolate (SPI) and polyethylene wax (PE-wax). Different characterization methods were used to study the effects of coating and its composition on the physical, mechanical, and barrier characteristics of paperboards. The results indicated that the incorporation of PE-wax into the coating formulation caused significant reduction of the viscosity of coating slurries. It had no effect on the coating weight of the samples P. Marzbani, M. Azadfallah (&) Department of Wood and Paper Science and Technology, Faculty of Natural Resources, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran e-mail: [email protected] M. Yousefzadeh Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran F. Najafi Department of Resin and Additives, Institute for Color Science and Technology, Tehran, Iran A. A. Pourbabaee Department of Soil Science, Faculty of Agriculture Engineering and Technology, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran H. Koivula Department of Food and Nutrition, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland M. Ritala Department of Chemistry, Faculty of Science, University of Helsinki, Helsinki, Finland
but increased the thickness of the coated paperboards as compared with those coated with SPI only. The increase of the wax content led to a reduction of 5– 16% in the tensile strength values in comparison with the uncoated paperboards. Barrier characteristics, i.e., water vapor permeability (WVP), surface wettability, and water resistance, improved by adding PE-wax. In addition, it was found that there was a critical level for the addition of PE-wax, 50% of SPI, as no oil migration was detected when the paperboards coated with SPI coatings contained less than 50% PE-wax. Keywords Paperboard, Dispersion coating, Soy protein isolate, Polyethylene wax, Barrier characteristics
Introduction Packaging, which is one of the major strategic marketing tools at the national and international levels, has a key role in protecting the product quality and increasing sales, reducing inventory, and maximizing the profits of manufacturing companies and increasing exports.1,2 Cellulosic substrates such as paper or paperboard play a vital role in the evolving global packaging market due to their good mechanical properties while being lightweight, low in price, easy to print, biodegradable, recyclab
Data Loading...
