The internal lacquers, coatings or linings, used to protect metal cans from the product and the product from interactions with the metal are critical to the safe performance of the can. Without effective coatings, at best the shelf-life of products in metal cans would be much shorter, and at worst there could be food safety and adverse health risks. For many years epoxy resins were the most commonly used can coatings. They have a proven track record for their performance, manufacturability and food safety. However, epoxy resins are made using Bisphenol A(BPA) as an intermediary and although the US Food and Drug Administration (FDA), European Food Safety Authority (EFSA) and many other regulatory agencies around the world approved the use of BPA-based coatings in food contact materials, in the past two decades there has been concern about the safety of BPA and its derivatives (1), and the potential for its migration into foods or drinks.
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