Cationic UV Coating Extractables

摘要

FDA-type migration experiments were conducted using a model cationic UV coating in an attempt to demonstrate that good container and packaging hygiene can be achieved if cationic UV inks and overprint varnishes are properly used to decorate and protect food containers and food packaging. After thermal processing, the coating samples were extracted two hours using different food simulants (aq. ethanol solutions) and processing conditions to simulate different foods and applications. Extraction samples were analyzed for epoxide and photoinitiator substances using GC and HPLC methods. Generally, ppb levels of UVR-6110, propylene carbonate (PC), diphenyl sulfide (DPS), and bis and thio salts were found. The concentrations of extractables depended on thermal treatment, processing temperature and solvent.