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An investigation of functional barriers currently used by the food industry and an assessment of the efficacy
Project Code: A03049
Food and Environment Research Agency, Sand Hutton, York YO41 1LZ
Bradley, E ; Castle, L
A functional barrier may be considered to be a barrier consisting of one or more layers which either reduces the migration of authorised substances below their specific migration limit (SML) or reduces the migration of non-authorised substances into foods or food simulants to a �not detectable� level.
The concept of a functional barrier has been proposed for inclusion in regulations on plastic food contact materials and articles. Although functional barriers are mainly associated with the use of recycled plastics for food packaging the concept has general relevance and may, in principle, be applied to any type of multi-layer structure.
Any barrier layer will need to prevent/reduce chemical migration from one or more of the following sources:
- an adhesive used in a laminate
- a non-food contact plastic layer
- non-food contact paper/board layer
- a printing ink or coating applied to the non food contact surface of a packaging material
There are many chemical substances present in these sources. This project will establish the ability of selected systems to act as functional barriers to migration.
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