Metallized films are produced by a thin layer of aluminum deposition on the top of the BOPP or BOPET films. The films that look silver in appearance enhance the aesthetics as well as the barrier properties of the film, making it more suitable to use into the packaging to improve the shelf life of the product.
Generally, metallization is preferred on a treated surface to have good adhesion with metal. The metal deposition measurement is done by the optical density level which in turn gives different barrier levels.
Chiripal Poly Films ltd makes food grade BOPP and BOPET films in accordance with EC and FDA regulations. Specific document and material safety data sheet for the film grades are available on request.