Mineral Oil Analysis in Recycled Fibre Food Packaging
Verify MOSH and MOAH compliance in recycled fibre packaging using accredited HPLC-GC-FID testing, validated functional barriers, and complete declarations of compliance.
Recycled Paperboard Migration
Hydrocarbon Transfer
Recovered paper stocks containing post-consumer printed packaging and newsprint carry residual chemical substances into recycled papermaking streams. Non-volatile and volatile compounds trapped in cellulose fibre matrices transfer into dry food products stored inside recycled packaging. Recycled paperboard migration defines the process by which mineral oil hydrocarbons and photoinitiators diffuse through air gaps or direct contact zones into packaged foods.
Gas phase diffusion represents the primary transfer mechanism for low molecular weight compounds at ambient storage temperatures. Uncoated recycled paperboard lacks structural barriers to prevent continuous hydrocarbon gas transfer over long shelf life periods.
Diffusion Mechanism
Chemical migrants evaporate from internal pulp fibres into the internal packaging headspace before adsorbing onto rice or dry cereal. Fatty foods absorb hydrophobic mineral oil molecules rapidly, creating steep concentration gradients that accelerate transport across the packaging interface. Evaluating recycled paperboard migration requires standardized testing using porous polymer simulants like Tenax under controlled temperature regimes.
Applying functional barrier coatings, such as ethylene vinyl alcohol or aqueous dispersion barriers, blocks volatile mass transfer. Inadequate barrier application allows mineral oil saturated and aromatic hydrocarbons to exceed safe human intake limits.
Safety Threshold
Regulatory authorities specify maximum chemical concentration limits in food contact substrates to protect consumer health. Functional barriers or virgin inner liners isolate food products from contaminated fibre networks. Recycled paperboard migration governs the design criteria for safe sustainable paper packaging structures.