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Impact of aggressive fill product for accelerated storage tests on packaging material in Tetra Recart

Kasapovic, Berina LU (2020) FKMM01 20192
Materials Engineering
Abstract
Tetra Recart is a paperboard-based package used for storing various kinds of food. The paperboard in Tetra Recart is covered with several layers having different functions to protect food from the environment as well as to extend the shelf life of a product. Storage of food with aggressive properties, such as high salt concentrations (> 1 %) in combination with low pH (< 4), has an impact on packaging materials and cause problems such as oxidation of an aluminium layer and loss of adhesion between the layers of plastic and aluminium. Therefore, these types of food products cannot be filled in today’s packaging solutions. Due to expected long shelf life of food products, an accelerated test method mimicking the effects would be beneficial... (More)
Tetra Recart is a paperboard-based package used for storing various kinds of food. The paperboard in Tetra Recart is covered with several layers having different functions to protect food from the environment as well as to extend the shelf life of a product. Storage of food with aggressive properties, such as high salt concentrations (> 1 %) in combination with low pH (< 4), has an impact on packaging materials and cause problems such as oxidation of an aluminium layer and loss of adhesion between the layers of plastic and aluminium. Therefore, these types of food products cannot be filled in today’s packaging solutions. Due to expected long shelf life of food products, an accelerated test method mimicking the effects would be beneficial for developing packaging materials with higher resistance. In this thesis, four different formulations with aggressive properties were prepared and used for the accelerated testing by storing in packages of interest. The evolution of food-package interaction was evaluated by inspecting spots on the aluminium foil, measuring adhesion strength between the layers of plastic and aluminium and stress - strain dependencies after storing the four formulations. The packages were stored at 35°C and 60°C from 12 days up to 12 weeks.
It was concluded that the most critical ingredients in the formulations were salt and acids in combination with the addition of an emulsifier that helps the ions reach the aluminium foil. It was also concluded that the polypropylene layer absorbs some of the formulations. The most aggressive formulation with most aggressive impact on the packaging material was formulation 4, however, formulation 1 is the most suitable to use for the accelerated storage tests. (Less)
Abstract (Swedish)
Tetra Recart är en kartongbaserad förpackning som används för förvaring av olika livsmedel. Pappersförpackningen består av flera olika lager med olika funktioner för att skydda livsmedlet från den omgivande miljön och för att förlänga hållbarheten av produkten. Lagring av livsmedel med så kallade aggressiva egenskaper, så som höga saltkoncentrationer (>1%) och låga pH (< 4), har en påverkan på förpackningsmateralet och leder till oxidering av aluminiumlagret och adhesionsförlust mellan plastlagret och aluminiumen. Eftersom dessa produkter oftast kan lagras länge är en accelererad testmetod med en fyllning som imiterar aggressiva livsmedel förmånlig för utvecklingen av förpackningsmaterialet. I det här examensarbetet har därför fyra olika... (More)
Tetra Recart är en kartongbaserad förpackning som används för förvaring av olika livsmedel. Pappersförpackningen består av flera olika lager med olika funktioner för att skydda livsmedlet från den omgivande miljön och för att förlänga hållbarheten av produkten. Lagring av livsmedel med så kallade aggressiva egenskaper, så som höga saltkoncentrationer (>1%) och låga pH (< 4), har en påverkan på förpackningsmateralet och leder till oxidering av aluminiumlagret och adhesionsförlust mellan plastlagret och aluminiumen. Eftersom dessa produkter oftast kan lagras länge är en accelererad testmetod med en fyllning som imiterar aggressiva livsmedel förmånlig för utvecklingen av förpackningsmaterialet. I det här examensarbetet har därför fyra olika aggressiva fyllningar vidarutvecklats och effekten på förpackningsmaterialet har undersökts genom att utvärdera fläckar på aluminiumfolien, mäta adhesionsstyrkan mellan plasten och aluminiumen samt dragprova plasten. Förpackningarna har förvarats i 35 respektive 60°C i allt från 12 dagar upp till 12 veckor.
De mest kritiska ingredienserna var salt och syror i kombination med emulgeringsmedel i formuleringarna gjorde att jonerna (syra och salt) lättare kunde nå aluminiumfolien. Den mest aggressiva formuleringen med störst påverkan på förpackningsmaterialet var formulering 4, dock rekommenderas formulering 1 som produkt för en accelererad testmetod. (Less)
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author
Kasapovic, Berina LU
supervisor
organization
course
FKMM01 20192
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Aggressive Food, pH, Packaging Material, Degradation, Adhesion, Tensile Testing, Mechanical Properties
other publication id
ISRN LUTFD2/TFMT--20/5062—SE
language
English
id
9005306
date added to LUP
2020-02-19 14:36:59
date last changed
2020-02-19 14:36:59
@misc{9005306,
  abstract     = {Tetra Recart is a paperboard-based package used for storing various kinds of food. The paperboard in Tetra Recart is covered with several layers having different functions to protect food from the environment as well as to extend the shelf life of a product. Storage of food with aggressive properties, such as high salt concentrations (> 1 %) in combination with low pH (< 4), has an impact on packaging materials and cause problems such as oxidation of an aluminium layer and loss of adhesion between the layers of plastic and aluminium. Therefore, these types of food products cannot be filled in today’s packaging solutions. Due to expected long shelf life of food products, an accelerated test method mimicking the effects would be beneficial for developing packaging materials with higher resistance. In this thesis, four different formulations with aggressive properties were prepared and used for the accelerated testing by storing in packages of interest. The evolution of food-package interaction was evaluated by inspecting spots on the aluminium foil, measuring adhesion strength between the layers of plastic and aluminium and stress - strain dependencies after storing the four formulations. The packages were stored at 35°C and 60°C from 12 days up to 12 weeks.
It was concluded that the most critical ingredients in the formulations were salt and acids in combination with the addition of an emulsifier that helps the ions reach the aluminium foil. It was also concluded that the polypropylene layer absorbs some of the formulations. The most aggressive formulation with most aggressive impact on the packaging material was formulation 4, however, formulation 1 is the most suitable to use for the accelerated storage tests.},
  author       = {Kasapovic, Berina},
  keyword      = {Aggressive Food,pH,Packaging Material,Degradation,Adhesion,Tensile Testing,Mechanical Properties},
  language     = {eng},
  note         = {Student Paper},
  title        = {Impact of aggressive fill product for accelerated storage tests on packaging material in Tetra Recart},
  year         = {2020},
}