Material Composition
Base boards made from secondary fibres that include a functional coating or layer to prevent the migration of contaminants combine sustainability with product protection. These recycled barrier substrates are designed to replace virgin fibre boards in applications where mineral oil migration from the recycled content would otherwise be a risk. The barrier can be applied on the paper machine or as a secondary converting step.
This allows for the use of lower cost raw materials without compromising food safety.
Functional Integrity
Efficiency of the protective layer must be maintained throughout the entire life cycle of the package. Any cracking or pinholes in the barrier will allow volatile gases to pass through to the food.
Resource Cycle
Utilizing these materials supports the high recovery rates of paper while providing the performance needed for sensitive products like dry cereals or pasta. Many of these substrates are engineered to be fully repulpable in standard recycling systems. This dual functionality is achieved through the use of specialized polymers or water based dispersion coatings.
Brand owners select recycled barrier substrates to meet their environmental targets while ensuring regulatory compliance in markets with strict migration laws. The development of these materials has reduced the industry’s reliance on plastic inner liners. Continuous improvement in coating technology is making these boards thinner and more efficient.
They represent a significant advancement in sustainable packaging design.
