Browsing by Author "Tuohimaa, Eira"

Adhesion of the food into the packaging has an important role in various stages of the supply chain of food production to recycling. If the food sticks to the surface of the package and the package does not get completely empty, there will be ethical and ecological problems due to the use of resources such as water, raw materials and energy which are wasted in considerable quantities. If the packaging does not empty properly, but leaves residues, the image of product’s quality in the eyes of the consumer will be reduced. The aim of this study was to develop packaging materials that reduce food losses by improving the release of the food from its packaging. The research topics were the emptying properties of the packaging materials and the adhesion of the oily foods to their surfaces. The work was carried out by testing the coated paperboards and trays adhesion properties. As model products, commercial marinade and rapeseed oil were used, and their viscosities were determined. The method used were 80° tilt test, stickiness test, contact angle measurement and chemical extraction combined with gas chromatography. Based on the results of the study, the amount of residue from an oily food at the surface of the packaging can be influenced by appropriate combination of mechanical and chemical treatments. Using a PE coating which is glossy and non-patterned with a chemical treatment is the best for ensuring removal of oily foods removed from the packaging. Food waste can be reduced by choosing the proper packaging type for each foodstuff based on its attributes.