A newly designed film closure in the form of a single polyester material is available in rolls from Hueck Foils (Wall, NJ). Lidding film is made of metallized PET and offers an alternative to paper/PET laminates.
Film has excellent peelability and optimal machine-processing properties company says. Lidding usually comprises a protective lacquer gravure or flexographic printing primer PET another layer of primer and a heat-seal lacquer. However lidding can also be metallized either for marketing reasons or to protect contents from light.