| abstract |
A metal transfer film of thermoplastic polymer includes a polymeric carrier film, a layer of metal to be transferred onto an article, and a layer of retention adhesive suitable for bonding the transferred metal layer to a surface of the article. The transferable metal layer is adjacent between the carrier film and the retention adhesive layer. Optionally, the carrier film has a releasably adhesive layer on the side in contact with the metal. The retention adhesive is a polyvinyl amine crosslinked with citric acid. The retention adhesive is deposited on the metal layer from a liquid solution and dried to a non-tacky, solid coating enabling handling of the metal transfer film in conventional film processing unit operations. The dry retention adhesive can be activated by the metal transfer operator remotely from the adhesive application process and provides significant oxygen, moisture and aroma barrier properties to the metal covered article. |