A1 Journal article (refereed), original research

The Durability of Press-formed Paperboard Trays – Effects of Sealing and Drying

Open Access publication

Publication Details
Authors: Niini Arvo, Leminen Ville, Tanninen Panu, Varis Juha, Laukala Teija
Publisher: Dept of Wood Paper Science, College of Natural Resources
Publication year: 2021
Language: English
Related Journal or Series Information: Bioresources
Volume number: 16
Issue number: 1
Start page: 236
End page: 248
Number of pages: 13
eISSN: 1930-2126
JUFO-Level of this publication: 1
Open Access: Open Access publication


Dimensional measurements were recorded to observe the durability of press-formed paperboard trays used for food processing via heating and cooling of the paperboard trays containing oatmeal. A set of the studied press-formed paperboard trays were dried before being heated, and a set of the paperboard trays were heat-sealed before being cooled to compare the effects of drying and sealing on the durability of the tray. In addition, empty trays were heated to observe the impact of food processing conditions on its durability via leak tests with a colouring solution as well as optical analysis of the material coating on the surface of the trays. The drying process of the trays was observed to improve the dimensional stability of the trays while being heated, and heat-sealing the trays yielded a major positive impact on the dimensional stability of the trays while being cooled. The leak tests and optical analysis results on the heated empty trays showed a negative durability impact from the food processing conditions. It was concluded that adjusting the heat-sealing parameters and food processing conditions is necessary in order to achieve improved durability of the press-formed paperboard trays for food processing purposes.

Last updated on 2020-16-11 at 14:32