Print Email Facebook Twitter Functional barriers: Properties and evaluation Title Functional barriers: Properties and evaluation Author Feigenbaum, A. Dole, P. Aucejo, S. Dainelli, D. de la Cruz Garcia, C. Hankemeier, T. N'Gono, Y. Papaspyrides, C.D. Paseiro, P. Pastorelli, S. Pavlidou, S. Pennarun, P.Y. Saillard, P. Vidal, L. Vitrac, O. Voulzatis, Y. TNO Kwaliteit van Leven Publication year 2005 Abstract Functional barriers are multilayer structures deemed to prevent migration of some chemicals released by food-contact materials into food. In the area of plastics packaging, different migration behaviours of mono- and multilayer structures are assessed in terms of lag time and of their influence of the solubility of the migrants in food simulants. Whereas barriers to oxygen or to aromas must prevent the diffusion of these compounds under conditions of use, a functional barrier must also be efficient under processing conditions, to prevent diffusion of substances when the polymer layers are in contact at high (processing) temperatures. Diffusion in melted polymers at high temperatures is much slower for glassy polymers, than in polymers that are rubbery at ambient temperature. To evaluate the behaviour of functional barriers under conditions of use, a set of reference diffusion coefficients in the 40-60°C range were determined for 14 polymers. Conditions for accelerated migration tests are proposed based on worst-case activation energy in the 40-60°C range. For simulation of migration, numerical models are available. The rules derived from the models can be used both by industry (to optimize a material in terms of migration) or by risk assessors. Differences in migration behaviour between mono- and multilayer materials are discussed. © 2005 Taylor & Francis. Chemicals / CAS: Alkanes; chlorobenzene, 108-90-7; Chlorobenzenes; Dibutyl Phthalate, 84-74-2; Dimethyl Sulfoxide, 67-68-5; nonane, 111-84-2; Polymers; Polypropylenes Subject PackagingAnalytical researchPackagingFunctional barrierMonolayersMultilayersplasticpolymerarticlecomputer simulationdiffusion coefficientfood contaminationfood handlingfood packagingfood processingfood safetyfood storageglass bottlemathematical computingmathematical modelpackaging materialplastic bottleplastic industrypriority journalreference valuethermoregulationAlkanesChlorobenzenesDibutyl PhthalateDimethyl SulfoxideEnvironmental ExposureEquipment DesignFood ContaminationFood PackagingHumansMolecular WeightPolymersPolypropylenesSolubilityTemperatureTime Factors To reference this document use: http://resolver.tudelft.nl/uuid:ad0979f8-629f-413d-96df-04ab5ca410dc DOI https://doi.org/10.1080/02652030500227776 TNO identifier 238736 ISSN 0265-203X Source Food Additives and Contaminants, 22 (10), 956-967 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.