| 摘要 |
<p>The packaged food product includes a food product and a package enclosing the food product The package is formed from a coated, printed film that includes a substrate film including one or more thermoplastic materials and having an average thickness of less than about 0.38 mm (15 mils). An image is printed on the print side of the substrate film. A radiation-cured varnish covers the printed image. The radiation-cured varnish was formed by coasting the printed image with a radiation-curable varnish that includes one or more polymerisable reactants and optionally one or more photoinitiators. The radiation-curable varnish is subsequently exposed to radiation sufficient to polymerise at least 90 weight % of the polymerisable reactants. In one embodiment, the radiation-curable varnish comprises less than 20% monofunctional monomer based on the weight of the radiation-curable varnish. When the coated, printed film is tested according to the FDA migration test protocol, no more than 50 parts per billion total of any of the polymerisable reactants and the optional photoinitiators migrate within 10 days at the 40°C from the coated, printed film into a food simulant of 95 weight % ethanol and 5 weight % water enclosed within a test container formed from the coated, printed film so that the food simulant contacts the food side of the substrate film and the ratio of volume of food simulant to surface area of coated, printed film is 10 millilitres per square inch.
In another embodiment the package comprises one or more heat-sealed regions and at least a portion of the radiation-cured varnish extends into the heat-sealed region;and
wherein the weight of the radiation-cured varnish per unit area of substrate film in the portion of the radiation-cured varnish extending into the heat-sealed region is at least substantially equal to the weight of radiation-cured varnish per unit area of substrate film outside of the heat-sealed region.</p> |
