GAB Isotherm Calculations for Microfibril Barrier Sorption Qualification
GAB isotherm parameters determine microfibril moisture sorption capacity and establish precise water activity thresholds for barrier packaging compliance.
Food Contact EU 1935 2004
Framework Standard
Regulation (EC) No 1935/2004 establishes basic safety mandates for packaging materials coming into contact with food products. Chemical components must not transfer into food in quantities that endanger human health or bring unacceptable changes in food composition. Applying food contact EU 1935 2004 requires traceability across every manufacturing step from pulp processing to final package converting.
Declaration of compliance documents verify that chemical constituents adhere to framework limits. Structural paperboard packaging and recycled fiber inserts fall directly under this European safety mandate.
Migration Limit
Specific migration testing measures chemical transfer from paperboard into liquid or dry food simulants. Functional barriers like polyolefin coatings prevent mineral oil hydrocarbons from migrating out of recycled paper stocks. Compliance with food contact EU 1935 2004 demands testing of virgin pulps and chemical sizing agents.
Volatile organic compounds and heavy metals must remain below defined chemical thresholds. Testing procedures simulate real storage times and storage temperatures encountered throughout retail supply chains. Non-compliant materials face immediate withdrawal from European commercial markets.
Compliance Boundary
Safety obligations apply up to the point of end consumer food consumption. Packaging materials lose authorization if intentional chemical modifications alter food organoleptic properties. Regulatory requirements cease for non-contact outer packaging separated by absolute barrier layers.