Therefore, fiber-based food packaging,especially primary packaging, is often restricted to virgin fibers or small amounts of recycled fibers.
Plastic pouches may be used as inner packaging to counteract migration, although care should be taken when choosing the plastic material.
For example, polyolefins are ineffective as barrier materials against mineral oil
Currently, the most appropriate way to decrease migration is to use a barrier
coating on top of the fiber material
Ideally, this layer should be bio-based and/or biodegradable.
However, this approach may result in some challenges, since the packaging materials and coatings
have many, sometimes conflicting, requirements of their functional properties during both
production and their intended end-use.