Paperboard Chemical Additive Retention and Migration Testing Methods
Paperboard chemical retention and migration compliance requires verifying wet-end additive fixation, simulant extractions, and mass transfer kinetic barriers.
FDA 176.170
Regulatory Standard
A federal regulation governs the chemical composition of paper and paperboard components that come into contact with aqueous and fatty foods. It lists the cleared substances, including sizing agents, pigments, and retention aids, along with their maximum permitted use levels. In the packaging industry, fda 176.170 establishes the safety criteria that paperboard must satisfy to be sold in the United States market for food applications.
Food Classification
Testing under fda 176.170 utilizes food simulants to measure the migration of substances from the packaging material. The regulation classifies foods based on their acidity and fat content, which dictates the temperature and duration of the extraction tests. Water, ethanol, and heptane are used to simulate the extraction potential of different foodstuffs under conditions of hot filling or long term storage.
Compliance Protocol
Mill chemists and packaging suppliers rely on this standard to verify that the additives used in the papermaking process are cleared for direct food contact. When a paperboard meets these requirements, the manufacturer issues a declaration of compliance that can be shared with the packaging converter and the brand owner. This documentation is essential because it guarantees that the finished carton will not release harmful substances into the packaged food, preventing chemical contamination and shielding the brand from legal liability.
It also provides a critical asset during customer audits, where food safety teams require full traceability of all chemical components used during the manufacturing of the board.