Numerical Simulation on Migration of Chemical Substances from HDPE into FoodsReport as inadecuate




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Numerical simulation of migration of chemical substances from HDPE into foods(simulants)is performed based on the finite element methodFEM. The results show that concentration of migrants in foods at equilibrium increases with the increase of its initial concentration in packaging. Diffusivity of migrants is key to migration dynamics. Partition coefficient represents ration of concentration in HDPE to that in foods at equilibrium. For multilayer packaging, functional barrier layer is able to efficiently delay migration. Thickness of barrier layers prominently influences barrier effect. The method can be utilized to predict migration of chemical substances having mixed boundary conditions, developed as a total solution food package for migration problems.

KEYWORDS

migration of chemical substances ; the finite element method ; plastic packaging ; food packaging safety

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Author: Yong Zhu, Zhiwei Wang

Source: http://www.scirp.org/



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