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Factors affecting migration kinetics from a generic epoxy-phenolic food can coating system
Janine Wagner1, Laurence Castle2, Peter K T Oldring3
1School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK.
Food Research International (Ottawa, Ont.)
|March 28, 2018
Summary
This study reveals how polymeric can coating properties affect chemical migration into food. Understanding these factors helps reduce unwanted chemical transfer using safety-by-design approaches.
Area of Science:
- Polymer science
- Food packaging science
- Chemical migration studies
Background:
- Chemical migration from food packaging is a concern for food safety.
- Understanding migration kinetics is crucial for developing safer food packaging.
- Polymeric can coatings are widely used but can release substances into food.
Purpose of the Study:
- To investigate the influence of polymeric can coating properties (thickness, crosslink density) on migration kinetics.
- To determine how migrant properties (size, polarity) affect migration into food simulants.
- To enhance the understanding and modeling of chemical migration from packaging.
Main Methods:
- Utilized four model migrants: bisphenol A diglycidyl ether (BADGE), BADGE·H2O, cyclo-diBADGE, and Uvitex OB.
- Employed fatty and aqueous food simulants at elevated temperatures (70-130°C).
- Measured apparent diffusion coefficients and calculated apparent activation energy for migration.
Main Results:
- Apparent diffusion coefficients decreased with increased crosslink density and increased with film thickness.
- Migration was influenced by the polarity of both the food simulant and the migrant.
- High apparent activation energies (250-264 kJ/mol) were observed for BADGE and related compounds.
Conclusions:
- Coating properties significantly impact migration kinetics, offering avenues for control.
- Findings support the improvement of predictive migration models for food packaging.
- Results facilitate safety-by-design strategies to minimize chemical migration into food products.
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